Knowledge Base

Could not start a new session. Response code 500. Message: Failed to read marionette port

2024-03-20T03:59:00.000-07:00

There is bug in firefox binary installed using apt/snap, I faced same issue when I installed firefox from apt package respository. I solved this by downloading firefox from official mozilla source and symlinked binary to /usr/bin/firefox/

First remove firefox from you system.

apt remove firefox

Download firefox from official source. (You may need to replace download URL)

wget https://download-installer.cdn.mozilla.net/pub/firefox/releases/116.0.3/linux-x86_64/en-US/firefox-116.0.3.tar.bz2

Extract downloaded archive to location you want. I am using opt to extract archive.

tar -xf firefox-116.0.3.tar.bz2 --directory /opt/

Symlink firefox binary to /usr/bin

ln -s /opt/firefox/firefox /usr/bin/firefox

Install imagick extension in PHP

2024-03-20T03:49:00.000-07:00

Install required packages

yum install php-pear php-devel gcc

Install ImageMagick

yum install ImageMagick
yum install ImageMagick-devel

Install ImageMagick PHP Extension

pecl install imagick
echo "extension=imagick.so" > /etc/php.d/imagick.ini

-- OR

Enable remi repository for centos using below guide.

https://www.ubuntumint.com/install-remi-repo-in-rhel-centos-rocky-almalinux/

Once remi repository enabled, you can directly install it from repository using yum.

yum install php-pecl-imagick

Restart Apache and check the installation

service httpd restart

Upgrade ubuntu 18.10(comic) to 20.04(focal)

2021-04-13T22:53:00.014-07:00

Upgrade ubuntu 18.10(comic) to 20.04(focal)

Ubuntu 18.10 has been end of life since 18th July 2019. It looks like they have now removed it (cosmic) completely from the apt repository.

You can still get Ubuntu 18.10 packages if you change your apt sources (/etc/apt/sources.list) to point to http://old-releases.ubuntu.com/ubuntu/. Note that these are not maintained and no security fixes will be applied.

A much better alternative, if you can, is to upgrade your system to a later version (eg: Ubuntu 20.04 LTS). There's an official tutorial on how to upgrade from 18.04 to 20.04.

The technique used should also apply to upgrading from 18.10, however please note that you may not be able to upgrade directly from 18.10 to 20.04. This may require multiple "hops"; meaning upgrading via another version or two to get all the way to 20.04. Follow below procedure to upgrade unsupported (18.10) version to latest

mkdir /tmp/comicupgrade

cd /tmp/comicupgrade

wget http://old-releases.ubuntu.com/ubuntu/dists/disco-updates/main/dist-upgrader-all/current/disco.tar.gz

tar -xf disco.tar.gz

python3 ./dist-upgrade.py

Do not turn off or reboot system between upgrade.

Once you are successfully updated to 19.04(Disco) you need upgrade to 19.10(eoan), again follow the same procedure.

mkdir /tmp/eoanupgrade

cd /tmp/eoanupgrade

wget http://old-releases.ubuntu.com/ubuntu/dists/eoan/main/dist-upgrader-all/current/eoan.tar.gz

tar -xf eoan.tar.gz

python3 ./dist-upgrade.py

Download and Install Virtualmin/Webmin on centos/ubuntu

2020-02-04T04:56:00.006-08:00

I am writing this blog as virtualmin/webmin is now being popular to manage Ubuntu and CentOS easily for normal users.
Virtualmin with webmin provides comprehensive command line interface, full API, sysadmin-friendly defaults, auditing, unmatched security features, Virtualmin is built on top of, and integrated with, Webmin. Webmin is the world's most popular Linux/UNIX systems management UI.

There are dozens of options for choosing how the new user interface behaves, allowing you to more thoroughly customize your experience and that of your users.

Lets we start the virtualmin installation now

All we need to have a freshly (highly recommended) installed Linux box installed with OS supported by virtualmin as mentioned below.

CentOS/RHEL 6 and 7 on i386 and x86_64

Debian 9 and 10 on i386 and amd64

Ubuntu 16.04 LTS and 18.04 LTS on i386 and amd64 (non-LTS releases are not supported)

ref : https://www.virtualmin.com/os-support.html

Now install wget if not available in your Linux OS.
For Ubuntu

$sudo apt install wget

For CentOS

$sudo yum install wget

Now we need to download script to start virtualmin installation.

wget http://software.virtualmin.com/gpl/scripts/install.sh

Its time to start installation now. Execute below command to run downloaded script.

sudo /bin/sh install.sh

The install script may ask you some questions. If your system does not have a fully qualified hostname, the script will ask you to provide one. Or, if your system doesn't have enough memory for the installation type you've chosen, it'll offer to create a swap file.

Now you can login to your virtualmin control panel with https://hostname-or ip:10000/.

e.g, https://localhost:10000/

For loop in bash

2020-02-02T14:51:00.004-08:00

How do I use bash for loop to repeat certain task under Linux / UNIX operating system? How do I set infinite loops using for statement? How do I use three-parameter for loop control expression?
A ‘for loop’ is a bash programming language statement which allows code to be repeatedly executed. A for loop is classified as an iteration statement i.e. it is the repetition of a process within a bash script. For example, you can run UNIX command or task 5 times or read and process list of files using a for loop. A for loop can be used at a shell prompt or within a shell script itself.

or loop syntax
Numeric ranges for syntax is as follows:

for VARIABLE in 1 2 3 4 5 .. N
do
 command1
 command2
 commandN
done

for VARIABLE in file1 file2 file3
do
 command1 on $VARIABLE
 command2
 commandN
done

for OUTPUT in $(Linux-Or-Unix-Command-Here)
do
 command1 on $OUTPUT
 command2 on $OUTPUT
 commandN
done

This type of for loop is characterized by counting. The range is specified by a beginning (#1) and ending number (#5). The for loop executes a sequence of commands for each member in a list of items. A representative example in BASH is as follows to display welcome message 5 times with for loop

#!/bin/bash
for i in 1 2 3 4 5
do
   echo "Welcome $i times"
done

Sometimes you may need to set a step value (allowing one to count by two’s or to count backwards for instance). Latest bash version 3.0+ has inbuilt support for setting up ranges

#!/bin/bash
for i in {1..5}
do
   echo "Welcome $i times"
done

Bash v4.0+ has inbuilt support for setting up a step value using {START..END..INCREMENT} syntax:

#!/bin/bash
echo "Bash version ${BASH_VERSION}..."
for i in {0..10..2}
  do 
     echo "Welcome $i times"
 done

Sample outputs:

Bash version 4.0.33(0)-release...
Welcome 0 times
Welcome 2 times
Welcome 4 times
Welcome 6 times
Welcome 8 times
Welcome 10 times

Beginners guide for solr installation

2018-03-27T01:55:00.009-07:00

Check Java version

1. You can install Solr in any system where a suitable Java Runtime Environment (JRE) is available, as detailed below. You will need the Java Runtime Environment (JRE) version 1.8 or higher. At a command line, check your Java version with below command

[root@ABC]# java -version

openjdk version "1.8.0_151"

OpenJDK Runtime Environment (build 1.8.0_151-b12)

OpenJDK 64-Bit Server VM (build 25.151-b12, mixed mode)

Download Solr

Download solr from http://lucene.apache.org/solr/ and extract with below command

tar zxf solr-x.y.z.tgz

Now enter to solr directory with cd command and start solr with below command

Start Solr

cd solr-x.y.gz/
bin/solr start

Now you can access solr in browser with port 8983

You will need to create a core to upload some data. Core creation command will be as follows.

bin/solr create -c CORE_NAME

You can now loacate new core in web interface also you can add some fields. To upload/insert data into solr you need to create data in json format. Lets take a below example to upload data in solr.

$ curl http://localhost:8983/solr/demo/update -d '
[
{"id" : "book1",
"title_t" : "The Way of Kings",
"author_s" : "Brandon Sanderson"
}
]'

now you can check inserted data on web interface,

$ curl http://localhost:8983/solr/demo/get?id=book1
{
"doc": {
"id" : "book1",
"author_s": "Brandon Sanderson",
"title_t" : "The Way of Kings",
"_version_": 1410390803582287872
}
}

CSRF Filter error on Share login with HTTPS/SSL

2018-03-27T01:19:00.002-07:00

In Alfresco CSRF filter has been added to Share in order to prevent Cross-Site Request Forgery attacks. When you configure a web server in front of Share to serve virtual hosts through HTTPS, a CSRF error could occur. To run the CSRF Token Filterbehind a web server Apache with mod_proxy and SSLEngine you may need to update the Origin and Referer headers in the CSRF Token Filter. In this article I show two possible solutions.

Apache VirtualHost

<VirtualHost *:443>
ServerName example.com
ProxyPass / http://localhost:8080/
ProxyPassReverse / http://localhost:8080/
SSLEngine on
SSLProtocol all
SSLCertificateFile /SSL_PATH/mycert.crt
SSLCertificateKeyFile /SSL_PATH/mycert.crt.key
SSLCertificateChainFile /SSL_PATH/mycert.crt.intermediate
</VirtualHost>

CSRF possible error when you login to Share

INFO [site.servlet.CSRFFilter] [ajp-apr-8009-exec-4] Possible CSRF attack noted when asserting referer
header 'https://example.com/share/page/'. Request: POST /share/page/dologinERROR [alfresco.web.site] [ajp-apr-8009-exec-4] javax.servlet.ServletException: Possible CSRF attack noted when asserting referer
header 'https://example.com/share/page/'. Request: POST /share/page/dologin

SOLUTION

Set the Referer and Origin in the CSRF Token Filter
Edit “CSR Policy” in TOMCAT_HOME/shared/classes/alfresco/web-extension/share-config-custom.xml, Uncomment "CSRF Policy" and add referrer and origin properties

<token>Alfresco-CSRFToken</token>

<referer>https://example.com/.*</referer>

<origin>https://example.com</origin>

</properties>

</config>

Parsing PDF with grobid

2018-03-16T12:53:00.000-07:00

PDF parsing for headers and its sub contents are really very difficult (It doesn't mean its impossible ) as PDF comes in various formats. But I recently encountered with tool named **GROBID** which can helps in this scenario. I know it's not perfect but if we provide proper training it can accomplish our goals.

Install GROBID

Getting GROBID

Latest stable release

The latest stable release of GROBID is version 0.5.1 which can be downloaded as follow:

> wget https://github.com/kermitt2/grobid/archive/0.5.1.zip
> unzip 0.5.1.zip

or using the docker container.

Current development version

The current development version is 0.6.0-SNAPSHOT, which can be downloaded from GitHub and built as follow:

Clone source code from github:

> git clone https://github.com/kermitt2/grobid.git

Or download directly the zip file:

> wget https://github.com/kermitt2/grobid/zipball/master> unzip master

Build GROBID

Please make sure that Grobid is installed in a path with no parent directories containing spaces.

Build GROBID with Gradle

The standard method for building GROBID is to use gradle. Under the main directory grobid/:

> ./gradlew clean install

By default, tests are ignored. For building the project and running the tests, use:

> ./gradlew clean install test

GROBID Service API

The GROBID Web API provides a simple and efficient way to use the tool. A service console is available to test GROBID in a human friendly manner. For production and benchmarking, we strongly recommand to use this web service mode on a multi-core machine and to avoid running GROBID in the batch mode.

Start the server

Go under the grobid/ main directory. Be sure that the GROBID project is built, see Install GROBID.

The following command will start the server on the default port 8070:
> ./gradlew run


You can check whether the service is up and running by opening the following URL:


http://yourhost:8070/api/version will return you the current version


http://yourhost:8070/api/isalive will return true/false whether the service is up and running



Configure the server

If required, modify the file under grobid/grobid-service/config/config.yaml for starting the server on a different port or if you need to change the absolute path to your grobid-home (e.g. when running on production). By default grobid-home is located under grobid/grobid-home. grobid-home contains all the models and static resources required to run GROBID.


Use GROBID test console

On your browser, the welcome page of the Service console is available at the URL http://localhost:8070

On the console, the RESTful API can be tested under the TEI tab for service returning a TEI document, under the PDF tab for services returning annotations relative to PDF or an annotated PDF and under the Patent tab for patent-related services

PDF to TEI conversion services

/api/processHeaderDocument

Extract the header of the input PDF document, normalize it and convert it into a TEI XML format.

consolidateHeader is a string of value 0 (no consolidation) or 1 (consolidate, default value).

method request type response type parameters requirement description

POST, PUT multipart/form-data application/xml input required PDF file to be processed
consolidateHeader optional consolidateHeader is a string of value 0 (no consolidation) or 1 (consolidate, default value)


You can test this service with the cURL command lines, for instance header extraction from a PDF file in the current directory:
curl -v --form input=@./thefile.pdf localhost:8070/api/processHeaderDocument


/api/processFulltextDocument

Convert the complete input document into TEI XML format (header, body and bibliographical section).

method request type response type parameters requirement description

POST, PUT multipart/form-data application/xml input required PDF file to be processed
consolidateHeader optional consolidateHeader is a string of value 0 (no consolidation) or 1 (consolidate, default value)
consolidateCitations optional consolidateCitations is a string of value 0 (no consolidation, default value) or 1 (consolidate all found citations)
teiCoordinates optional list of element names for which coordinates in the PDF document have to be added, see Coordinates of structures in the original PDF for more details


You can test this service with the cURL command lines, for instance fulltext extraction (header, body and citations) from a PDF file in the current directory:
curl -v --form input=@./thefile.pdf localhost:8070/api/processFulltextDocument


fulltext extraction and add coordinates to the figures (and tables) only:
> curl -v --form input=@./12248_2011_Article_9260.pdf --form teiCoordinates=figure --form teiCoordinates=biblStruct localhost:8070/api/processFulltextDocument


fulltext extraction and add coordinates for all the supported coordinate elements (sorry for the ugly cURL syntax on this, but that's how cURL is working!):
> curl -v --form input=@./12248_2011_Article_9260.pdf --form teiCoordinates=persName --form teiCoordinates=figure --form teiCoordinates=ref --form teiCoordinates=biblStruct --form teiCoordinates=formula localhost:8070/api/processFulltextDocument


/api/processReferences

Extract and convert all the bibliographical references present in the input document into TEI XML format.

method request type response type parameters requirement description

POST, PUT multipart/form-data application/xml input required PDF file to be processed
consolidateCitations optional consolidateCitations is a string of value 0 (no consolidation, default value) or 1 (consolidate all found citations)


You can test this service with the cURL command lines, for instance extraction and parsing of all references from a PDF in the current directory without consolidation (default value):
curl -v --form input=@./thefile.pdf localhost:8070/api/processReferences


Raw text to TEI conversion services

/api/processDate

Parse a raw date string and return the corresponding normalized date in ISO 8601 embedded in a TEI fragment.

method request type response type parameters requirement description

POST, PUT application/x-www-form-urlencoded application/xml date required date to be parsed as raw string


You can test this service with the cURL command lines, for instance parsing of a raw date string:
curl -X POST -d "date=September 16th, 2001" localhost:8070/api/processDate


which will return:
<date when="2001-9-16" />


/api/processHeaderNames

Parse a raw string corresponding to a name or a sequence of names from a header section and return the corresponding normalized authors in TEI format.

method request type response type parameters requirement description

POST, PUT application/x-www-form-urlencoded application/xml names required sequence of names to be parsed as raw string


You can test this service with the cURL command lines, for instance parsing of a raw sequence of header names string:
curl -X POST -d "names=John Doe and Jane Smith" localhost:8070/api/processHeaderNames


which will return:
<persName xmlns="http://www.tei-c.org/ns/1.0">
    <forename type="first">John</forename>
    <surname>Doe</surname>
</persName>
<persName xmlns="http://www.tei-c.org/ns/1.0">
    <forename type="first">Jane</forename>
    <surname>Smith</surname>
</persName>


/api/processCitationNames

Parse a raw sequence of names from a bibliographical reference and return the corresponding normalized authors in TEI format.

method request type response type parameters requirement description

POST, PUT application/x-www-form-urlencoded application/xml names required sequence of names to be parsed as raw string


You can test this service with the cURL command lines, for instance parsing of a raw sequence of citation names string:
curl -X POST -d "names=J. Doe, J. Smith and B. M. Jackson" localhost:8070/api/processCitationNames


which will return:
<persName xmlns="http://www.tei-c.org/ns/1.0">
    <forename type="first">J</forename>
    <surname>Doe</surname>
</persName>
<persName xmlns="http://www.tei-c.org/ns/1.0">
    <forename type="first">J</forename>
    <surname>Smith</surname>
</persName>
<persName xmlns="http://www.tei-c.org/ns/1.0">
    <forename type="first">B</forename>
    <forename type="middle">M</forename>
    <surname>Jackson</surname>
</persName>


/api/processAffiliations

Parse a raw sequence of affiliations with or without address and return the corresponding normalized affiliations with address in TEI format.

method request type response type parameters requirement description

POST, PUT application/x-www-form-urlencoded application/xml affiliations required sequence of affiliations+addresses to be parsed as raw string


You can test this service with the cURL command lines, for instance parsing of a raw affiliation string:
curl -X POST -d "affiliations=Stanford University, California, USA" localhost:8070/api/processAffiliations


which will return:
<affiliation>
    <orgName type="institution">Stanford University</orgName>
    <address>
        <region>California</region>
        <country key="US">USA</country>
    </address>
</affiliation


/api//processCitation

Parse a raw bibliographical reference (in isolation) and return the corresponding normalized bibliographical reference in TEI format.

method request type response type parameters requirement description

POST, PUT application/x-www-form-urlencoded application/xml citations required bibliographical reference to be parsed as raw string
consolidateCitations optional consolidateCitations is a string of value 0 (no consolidation, default value) or 1 (consolidate the citation)


You can test this service with the cURL command lines, for instance parsing of a raw bibliographical reference string in isolation without consolidation (default value):
curl -X POST -d "citations=Graff, Expert. Opin. Ther. Targets (2002) 6(1): 103-113" localhost:8070/api/processCitation


which will return:
<biblStruct >
    <analytic>
        <title/>
        <author>
            <persName xmlns="http://www.tei-c.org/ns/1.0"><surname>Graff</surname></persName>
        </author>
    </analytic>
    <monogr>
        <title level="j">Expert. Opin. Ther. Targets</title>
        <imprint>
            <biblScope unit="volume">6</biblScope>
            <biblScope unit="issue">1</biblScope>
            <biblScope unit="page" from="103" to="113" />
            <date type="published" when="2002" />
        </imprint>
    </monogr>
</biblStruct>



PDF annotation services

/api/referenceAnnotations

Return JSON annotations with coordinates in the PDF to be processed, relative to the reference informations: reference callouts with links to the full bibliographical reference and bibliographical reference with possible external URL.

As the annotations are provided for dynamic display on top a PDF rendered in javascript, no PDF is harmed during these processes !

For information about how the coordinates are provided, see Coordinates of structures in the original PDF.

method request type response type parameters requirement description

POST multipart/form-data application/json input required PDF file to be processed, returned coordinates will reference this PDF
consolidateCitations optional consolidateCitations is a string of value 0 (no consolidation, default value) or 1 (consolidate the citation)


/api/annotatePDF

Return the PDF augmented with PDF annotations relative to the reference informations: reference callouts with links to the full bibliographical reference and bibliographical reference with possible external URL.

Note that this service modify the original PDF, and thus be careful with legal right and reusability of such augmented PDF! For this reason, this service is proposed for experimental purposes and might be deprecated in future version of GROBID, in favor of the above /api/referenceAnnotations service.

method request type response type parameters requirement description

POST multipart/form-data application/pdf input required PDF file to be processed
consolidateCitations optional consolidateCitations is a string of value 0 (no consolidation, default value) or 1 (consolidate the citation)


Citation extraction and normalization from patents

/api/processCitationPatentTXT

Extract and parse the patent and non patent citations in the description of a patent publication sent as UTF-8 text. Results are returned as a list of TEI citations.

method request type response type parameters requirement description

POST, PUT application/x-www-form-urlencoded application/xml input required patent text to be processed as raw string
consolidateCitations optional consolidateCitations is a string of value 0 (no consolidation, default value) or 1 (consolidate the citation)


You can test this service with the cURL command lines, for instance parsing of a raw bibliographical reference string in isolation without consolidation (default value):
curl -X POST -d "input=In EP0123456B1 nothing interesting." localhost:8070/api/processCitationPatentTXT


which will return:
<?xml version="1.0" encoding="UTF-8"?>
<TEI
    xmlns="http://www.tei-c.org/ns/1.0"
    xmlns:xlink="http://www.w3.org/1999/xlink">
    <teiHeader />
    <text>
        <div id="_mWYp9Fa">In EP0123456B1 nothing interesting.</div>
        <div type="references">
            <listBibl>
                <biblStruct type="patent" status="publication">
                    <monogr>
                        <authority>
                            <orgName type="regional">EP</orgName>
                        </authority>
                        <idno type="docNumber" subtype="epodoc">0123456</idno>
                        <idno type="docNumber" subtype="original">0123456</idno>
                        <imprint>
                            <classCode scheme="kindCode">B1</classCode>
                        </imprint>
                        <ptr target="#string-range('mWYp9Fa',5,9)"></ptr>
                    </monogr>
                </biblStruct>
            </listBibl>
        </div>
    </text>
</TEI>


/api/processCitationPatentTEI

Extract and parse the patent and non patent citations in the description of a patent publication encoded in TEI (Patent Document Model). Results are added to the original document as TEI stand-off annotations.

method request type response type parameters requirement description

POST, PUT multipart/form-data application/xml input required TEI file of the patent document to be processed
consolidateCitations optional consolidateCitations is a string of value 0 (no consolidation, default value) or 1 (consolidate the citation)


/api/processCitationPatentST36

Extract and parse the patent and non patent citations in the description of a patent publication encoded in ST.36. Results are returned as a list of TEI citations.

method request type response type parameters requirement description

POST, PUT multipart/form-data application/xml input required XML file in ST36 standard of the patent document to be processed
consolidateCitations optional consolidateCitations is a string of value 0 (no consolidation, default value) or 1 (consolidate the citation)


/api/processCitationPatentPDF

Extract and parse the patent and non patent citations in the description of a patent publication sent as PDF. Results are returned as a list of TEI citations. Note that the text layer must be available in the PDF to be processed (which is, surprisingly in this century, very rarely the case with the PDF avaialble from the main patent offices - however the patent publications that can be downloaded from Google Patents for instance have been processed by a good quality OCR).

Extract and parse the patent and non patent citations in the description of a patent encoded in ST.36. Results are returned as a lits of TEI citations.

method request type response type parameters requirement description

POST, PUT multipart/form-data application/xml input required PDF file of the patent document to be processed
consolidateCitations optional consolidateCitations is a string of value 0 (no consolidation, default value) or 1 (consolidate the citation)


/api/citationPatentAnnotations

This service is similar to /api/referenceAnnotations but for a patent document in PDF. JSON annotations relative the the input PDF are returned with coordinates as described in the page Coordinates of structures in the original PDF.

Patent and non patent citations can be directly visualised on the PDF layout as illustrated by the GROBID console. For patent citations, the provided external reference informations are based on the patent number normalisation and relies on Espacenet, the patent access application from the European Patent office. For non patent citation, the external references are similar as for a scientific article (CorssRef DOI link or arXiv.org if an arXiv ID is present).

method request type response type parameters requirement description

POST multipart/form-data application/json input required Patent publication PDF file to be processed, returned coordinates will reference this PDF
consolidateCitations optional consolidateCitations is a string of value 0 (no consolidation, default value) or 1 (consolidate the citation)


Administration services

Configuration of the password for the service adminstration

A password is required to access the administration page under the Admin tab in the console. The default password for the administration console is admin.

For security, the password is saved as SHA1 hash in the file grobid-service/src/main/conf/grobid_service.properties with the property name org.grobid.service.admin.pw

To change the password, you can replace this property value by the SHA1 hash generated for your new password of choice. To generate the SHA1 from any <input_string>, you can use the corresponding Grobid REST service available at:


http://localhost:8070/api/sha1?sha1=<input_string>


See below for the /api/sha1 service description.

/api/admin

Request to get parameters of grobid.properties formatted in html table.

method request type response type parameters requirement description

POST application/x-www-form-urlencoded text/html sha1 required Administration password hashed using sha1


method request type response type parameters requirement description

GET string text/html sha1 required Administration password hashed using sha1


Example of usage with GET method: /api/admin?sha1=<pwd>

/api/sha1

Request to get an input string hashed using sha1.

method request type response type parameters requirement description

POST application/x-www-form-urlencoded text/html sha1 required String (password) to be hashed using sha1


method request type response type parameters requirement description

GET string text/html sha1 required String (password) to be hashed using sha1


Example of usage with GET method: /api/sha1?sha1=<pwd>

/api/allProperties

Request to get all properties key/value/type as XML.

method request type response type parameters requirement description

POST application/x-www-form-urlencoded text/html sha1 required Administration password hashed using sha1


method request type response type parameters requirement description

GET string text/html sha1 required Administration password hashed using sha1


Example of usage with GET method: /api/allProperties?sha1=<password>

Sent xml follow the following schema:
<properties>
    <property>
        <key>key</key>
        <value>value</value>
        <type>type</type>
    </property>
    <property>...</property>
</properties>


/api/changePropertyValue

Change the property value from the property key passed in the xml input.

method request type response type parameters requirement description

POST application/x-www-form-urlencoded text/html xml required XML input specifying the administrative password hashed using sha1 and a new property/value following the schema below


method request type response type parameters requirement description

GET string text/html xml required XML input specifying the administrative password hashed using sha1 and a new property/value following the schema below


Example of usage with GET method: /api/changePropertyValue?xml=<some_xml>

XML input has to follow the following schema:
<changeProperty>
    <password>pwd</password>
    <property>
        <key>key</key>
        <value>value</value>
        <type>type</type>
    </property>
</changeProperty>


Parallel mode

The Grobid RESTful API provides a very efficient way to use the library out of the box, because the service exploits multithreading.

The service can work following two modes:

Parallel execution (default): a pool of threads is used to process requests in parallel. The following property must be set to true in the file grobid-home/config/grobid_service.properties

    org.grobid.service.is.parallel.execution=true


As Grobid is thread safe and manages a pool of parser instances, it is also possible to use several threads to call the REST service. This improves considerably the performance of the services for PDF processing because documents can be processed while other are uploaded.

Sequencial execution: a single Grobid instance is used and process the requests as a queue. The following property must be set to false in the file grobid-home/config/grobid_service.properties

    org.grobid.service.is.parallel.execution=false


This mode is adapted for server running with a low amount of RAM, for instance less than 2GB, otherwise the default parallel execution must be used.

method	request type	response type	parameters	requirement	description
POST, PUT	multipart/form-data	application/xml	input	required	PDF file to be processed
			consolidateHeader	optional	consolidateHeader is a string of value 0 (no consolidation) or 1 (consolidate, default value)

method	request type	response type	parameters	requirement	description
POST, PUT	multipart/form-data	application/xml	input	required	PDF file to be processed
			consolidateHeader	optional	consolidateHeader is a string of value 0 (no consolidation) or 1 (consolidate, default value)
			consolidateCitations	optional	consolidateCitations is a string of value 0 (no consolidation, default value) or 1 (consolidate all found citations)
			teiCoordinates	optional	list of element names for which coordinates in the PDF document have to be added, see Coordinates of structures in the original PDF for more details

method	request type	response type	parameters	requirement	description
POST, PUT	multipart/form-data	application/xml	input	required	PDF file to be processed
			consolidateCitations	optional	consolidateCitations is a string of value 0 (no consolidation, default value) or 1 (consolidate all found citations)

method	request type	response type	parameters	requirement	description
POST, PUT	application/x-www-form-urlencoded	application/xml	date	required	date to be parsed as raw string

method	request type	response type	parameters	requirement	description
POST, PUT	application/x-www-form-urlencoded	application/xml	names	required	sequence of names to be parsed as raw string

method	request type	response type	parameters	requirement	description
POST, PUT	application/x-www-form-urlencoded	application/xml	names	required	sequence of names to be parsed as raw string

method	request type	response type	parameters	requirement	description
POST, PUT	application/x-www-form-urlencoded	application/xml	affiliations	required	sequence of affiliations+addresses to be parsed as raw string

method	request type	response type	parameters	requirement	description
POST, PUT	application/x-www-form-urlencoded	application/xml	citations	required	bibliographical reference to be parsed as raw string
			consolidateCitations	optional	consolidateCitations is a string of value 0 (no consolidation, default value) or 1 (consolidate the citation)

method	request type	response type	parameters	requirement	description
POST	multipart/form-data	application/json	input	required	PDF file to be processed, returned coordinates will reference this PDF
			consolidateCitations	optional	consolidateCitations is a string of value 0 (no consolidation, default value) or 1 (consolidate the citation)

method	request type	response type	parameters	requirement	description
POST	multipart/form-data	application/pdf	input	required	PDF file to be processed
			consolidateCitations	optional	consolidateCitations is a string of value 0 (no consolidation, default value) or 1 (consolidate the citation)

method	request type	response type	parameters	requirement	description
POST, PUT	application/x-www-form-urlencoded	application/xml	input	required	patent text to be processed as raw string
			consolidateCitations	optional	consolidateCitations is a string of value 0 (no consolidation, default value) or 1 (consolidate the citation)

method	request type	response type	parameters	requirement	description
POST, PUT	multipart/form-data	application/xml	input	required	TEI file of the patent document to be processed
			consolidateCitations	optional	consolidateCitations is a string of value 0 (no consolidation, default value) or 1 (consolidate the citation)

method	request type	response type	parameters	requirement	description
POST, PUT	multipart/form-data	application/xml	input	required	XML file in ST36 standard of the patent document to be processed
			consolidateCitations	optional	consolidateCitations is a string of value 0 (no consolidation, default value) or 1 (consolidate the citation)

method	request type	response type	parameters	requirement	description
POST, PUT	multipart/form-data	application/xml	input	required	PDF file of the patent document to be processed
			consolidateCitations	optional	consolidateCitations is a string of value 0 (no consolidation, default value) or 1 (consolidate the citation)

method	request type	response type	parameters	requirement	description
POST	multipart/form-data	application/json	input	required	Patent publication PDF file to be processed, returned coordinates will reference this PDF
			consolidateCitations	optional	consolidateCitations is a string of value 0 (no consolidation, default value) or 1 (consolidate the citation)

method	request type	response type	parameters	requirement	description
POST	application/x-www-form-urlencoded	text/html	sha1	required	Administration password hashed using sha1

method	request type	response type	parameters	requirement	description
GET	string	text/html	sha1	required	Administration password hashed using sha1

method	request type	response type	parameters	requirement	description
POST	application/x-www-form-urlencoded	text/html	sha1	required	String (password) to be hashed using sha1

method	request type	response type	parameters	requirement	description
GET	string	text/html	sha1	required	String (password) to be hashed using sha1

method	request type	response type	parameters	requirement	description
POST	application/x-www-form-urlencoded	text/html	sha1	required	Administration password hashed using sha1

method	request type	response type	parameters	requirement	description
GET	string	text/html	sha1	required	Administration password hashed using sha1

method	request type	response type	parameters	requirement	description
POST	application/x-www-form-urlencoded	text/html	xml	required	XML input specifying the administrative password hashed using sha1 and a new property/value following the schema below

method	request type	response type	parameters	requirement	description
GET	string	text/html	xml	required	XML input specifying the administrative password hashed using sha1 and a new property/value following the schema below

Create a Linux Swap

2018-03-15T03:46:00.002-07:00

Swap space/partition is space on a disk created for use by the operating system when memory has been fully utilized. It can be used as virtual memory for the system; it can either be a partition or a file on a disk.

When the kernel runs out of memory, it can move idle/inactive processes into swap creating room for active processes in the working memory. This is memory management that involves swapping sections of memory to and from virtual memory.

1. In this example, we will create a swap file of size 2GB using the dd command as follows. Note that bs=1024means read and write up to 1024 bytes at a time and count = (1024 x 2048)MB size of the file.

# dd if=/dev/zero of=/mnt/swapfile bs=1024 count=2097152

Alternatively, use the fallocate command as follows.

# fallocate --length 2GiB /mnt/swapfile

And then set the appropriate permissions on the file; make it readable only by root user as follows.

# chmod 600 /mnt/swapfile

2. Now setup the file for swap space with the mkwap command.

# mkswap /mnt/swapfile

3. Next, enable the swap file and add it to the system as a swap file.

# swapon /mnt/swapfile

4. Afterwards, enable the swap file to be mounted at boot time. Edit the /etc/fstab file and add the following line in it.

/mnt/swapfile swap swap defaults 0 0

In the line above, each field means:

/mnt/swapfile – device/file name
swap – defines device mount point
swap – specifies the file-system type
defaults – describes the mount options
0 – specifies the option to be used by the dump program
0 – specifies the fsck command option

6. To set how often the swap file can be used by the kernel, open the /etc/sysctl.conf file and add the line below.

Note that the default value of how frequent swap space can be used is 60 (maximum value is 100). The higher the number, the more frequent swap space utilization by the kernel. When the value is set to 0, the swap file will only be used if the operating system has fully utilized memory.

vm.swappiness=10

6. Now verify the swap file was created using the swapon command.

# swapon  -s
OR
# free
OR
# cat  /proc/swaps

Apache daemon doesn't start : No space left on device

2017-08-01T21:12:00.002-07:00

I came across this condition various times, if search on the google you will get lots of solutions and most of those will suggest to kill semaphores and restart Apache like below.

When you get No space left on device even you have enough space left on server. You can check open semaphores with below command

#ipcs -s

------ Semaphore Arrays --------

key semid owner perms nsems

0x00000000 655360 apache 600 1

0x00000000 753665 apache 600 1

If you see list of semaphores which owns by Apache, you need to kill them and restart Apache.

#for semid in `ipcs -s | grep apache | cut -f2 -d" "`; do ipcrm -s $semid; done

Most of the time it works, but sometime we need to increase semaphore array limits specially when we have large number of Virtual Hosts in Apache. Default semaphore array limit is 128, some time we need to increase it as per our requirements.

You can check current limit with below command.

#ipcs -ls

or

#cat /proc/sys/kernel/sem

To increase limits, edit /etc/sysctl.conf and append below line in file.

kernel.msgmni = 1024
kernel.sem = 250 256000 32 1024

Once you done run below command.

#sysctl -p

Hope this help.

The application finder can't be opened (10810)

2012-02-01T00:51:00.000-08:00

Before some days I had issue with the finder due to improper shutdown. Then I've goggled for the same issue & I find below solution. Not sure but its worked for me.

I've rebuild LaunchServices database in Leopard with "lsregister". May be "lsregister" have different location in another version. Locate & run below command from Terminal.

You can use "spotlight" to open terminal as finder is not working.

/System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.fram ework/Support/lsregister -kill -r -domain local -domain system -domain user

Configure LAMP server (Linux + Apache + MySQL + PHP/Perl) on Linux

2012-01-23T10:05:00.001-08:00

Configure LAMP server (Linux + Apache + MySQL + PHP/Perl) on Linux

1) Install Apache
# yum install httpd httpddevel

start the apache service
# /etc/init.d/httpd start

2) Install MySQL Database Server

# yum install mysql mysqlserver mysqldevel
# /etc/init.d/mysqld start
# mysql

Changing MySQL Root Password

# mysql> USE mysql;
# mysql> UPDATE user SET Password=PASSWORD('newpassword') WHERE user='root';
# mysql> FLUSH PRIVILEGES;

Once done, check by logging in:

# mysql u root p
Enter Password:

To Create A New MySQL User

# mysql > create database demo
# mysql >GRANT ALL PRIVILEGES ON demo.* TO 'guest'@'localhost' IDENTIFIED BY 'guest'
WITH GRANT OPTION;
# mysql> UPDATE user SET Password=PASSWORD('guest') WHERE user='guest';

3) Install PHP5
# yum install php phpmysql phpcommon phpgd phpmbstring phpmcrypt phpdevel phpxml

Test If PHP Is Working Or Not:
Create a file named /var/www/html/test.php with the following phpinfo() function inside php
quotes.
// test.php
phpinfo();
?>
Then point your browser to http://ip.address/test.php.

4) Install phpMyAdmin
phpMyAdmin is a free web based MySQL database Administration Tool

# yum install phpmyadmin
Point your browser to: http://ip.address/phpmyadmin.

5) Install Webmin
wget
rpm i webmin1.4101.noarch.rpm

Point your browser to: http://ip.address:10000

You should see a webmin login. But we don't know the login and password yet! To set up the
webmin password run the script below...

# /usr/libexec/webmin/changepass.pl /etc/webmin admin

Log in with the admin username and new webmin password!
To uninstall webmin, just run:

# /etc/webmin/uninstall.sh

6) Final Steps
We want the Apache and mysql to be loaded at every boot so we switch them on using chkconfig:
# chkconfig httpd on
# chkconfig mysqld on

Recover MySQL root Password

2012-01-23T10:04:00.000-08:00

You can recover MySQL database server password with following five easy steps.

Step # 1: Stop the MySQL server process.

Step # 2: Start the MySQL (mysqld) server/daemon process with the --skip-grant-tables option so that it will not prompt for password.

Step # 3: Connect to mysql server as the root user.

Step # 4: Setup new mysql root account password i.e. reset mysql password.

Step # 5: Exit and restart the MySQL server.

Here are commands you need to type for each step (login as the root user):

Step# 1 : Stop mysql service

# /etc/init.d/mysql stop
Output:

Stopping MySQL database server: mysqld.

Step # 2: Start to MySQL server w/o password:

# mysqld_safe --skip-grant-tables &
Output:

[1] 5988
Starting mysqld daemon with databases from /var/lib/mysql
mysqld_safe[6025]: started

Step # 3: Connect to mysql server using mysql client:

# mysql -u root
Output:

Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1 to server version: 4.1.15-Debian_1-log

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql>

Step # 4: Setup new MySQL root user password

mysql> use mysql;
mysql> update user set password=PASSWORD("NEW-ROOT-PASSWORD") where User='root';
mysql> flush privileges;
mysql> quit
Step # 5: Stop MySQL Server:

# /etc/init.d/mysql stop
Output:

Stopping MySQL database server: mysqld
STOPPING server from pid file /var/run/mysqld/mysqld.pid
mysqld_safe[6186]: ended

[1]+ Done mysqld_safe --skip-grant-tables

Step # 6: Start MySQL server and test it

# /etc/init.d/mysql start
# mysql -u root -p

How To Flush Linux / UNIX DNS Cache

2012-01-23T10:02:00.000-08:00

Flush nscd dns cache

Nscd caches libc-issued requests to the Name Service. If retrieving NSS data is fairly expensive, nscd is able to speed up consecutive access to the same data dramatically and increase overall system performance. Just restart nscd:

$ sudo /etc/init.d/nscd restart
OR
# service nscd restart

Flush dnsmasq dns cache

dnsmasq is a lightweight DNS, TFTP and DHCP server. It is intended to provide coupled DNS and DHCP service to a LAN. Dnsmasq accepts DNS queries and either answers them from a small, local, cache or forwards them to a real, recursive, DNS server. This software is also installed many cheap routers to cache dns queries. Just restart to flush out dns cache:

$ sudo /etc/init.d/dnsmasq restart

Flush caching BIND server dns cache

A caching BIND server obtains information from another server (a Zone Master) in response to a host query and then saves (caches) the data locally. All you have to do is restart bind to clear its cache:

# /etc/init.d/named restart

How to check a perticular process uptime in Linuz

2012-01-23T09:59:00.000-08:00

We can check a uptime for any process using linux command. But you should have to know process ID for this.

We can find process ID using below commands.
#ps -ef | grep process_name

Below is the command which provides you the uptime for this process.

#ps -p 12119 -o "%t"

Alter Multiple tables using bash script

2012-01-23T09:56:00.000-08:00

Below is the shell script to alter multiple tables.

#!/bin/bash

DATABASENAME="DBNAME"
for t in `echo "show tables" | mysql --batch --skip-column-names $DATABASENAME`;
do mysql $DATABASENAME -e "ALTER TABLE $t ENGINE=NDBCLUSTER";
done

How to repaire all MySQL tables in one command

2012-01-23T09:50:00.000-08:00

You can use below command to optimize & repair all tables.

#mysqlcheck -u root -p --auto-repair --check --optimize --all-databases

Count all records from your MySQL databse

2012-01-23T09:48:00.000-08:00

If you want to count all records from your database, follow below instructions.

1) Login To your database.

2) Execute below query

> SELECT table_name, TABLE_ROWS FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = 'DATABASE_NAME' order by TABLE_ROWS asc;

You have to change only database_name from above query.

MySQL Change root Password

2012-01-23T09:43:00.001-08:00

How do I change MySQL root password under Linux, FreeBSD, OpenBSD and UNIX like operating system over ssh / telnet session?

Setting up MySQL password is one of the essential tasks. By default root user is MySQL admin account user. Please note that the Linux / UNIX root account for your operating system and MySQL root are different. They are separate and nothing to do with each other. Sometime your may remove mysql root account and setup admin as mysql super user for security purpose.
mysqladmin command to change root password

If you have never set a root password for MySQL server, the server does not require a password at all for connecting as root. To setup root password for first time, use mysqladmin command at shell prompt as follows:

$ mysqladmin -u root password NEWPASSWORD

However, if you want to change (or update) a root password, then you need to use the following command:

$ mysqladmin -u root -p'oldpassword' password newpass

For example, If the old password is abc, you can set the new password to 123456, enter:

$ mysqladmin -u root -p'abc' password '123456'

Change MySQL password for other users

To change a normal user password you need to type (let us assume you would like to change password for user vivek) the following command:

$ mysqladmin -u vivek -p oldpassword password newpass

Changing MySQL root user password using MySQL sql command

This is another method. MySQL stores username and passwords in user table inside MySQL database. You can directly update password using the following method to update or change password for user vivek:

1) Login to mysql server, type the following command at shell prompt:

$ mysql -u root -p

2) Use mysql database (type command at mysql> prompt):

mysql> use mysql;

3) Change password for user vivek, enter:

mysql> update user set password=PASSWORD("NEWPASSWORD") where User='vivek';

4) Finally, reload the privileges:

mysql> flush privileges;
mysql> quit

The last method can be used with PHP, Python or Perl scripting mysql API.

Know your Motherboard in linux

2012-01-23T09:42:00.001-08:00

check motherboard information in Linux

To check motherboard information in Linux, you can use either lspci or dmidecode.

# lspci –vv
# dmidecode

Force non-www to www and http to https using redirect rules

2011-12-16T03:03:00.000-08:00

We can redirect non-www to www is quiet easy task with the mod_redirect. You can use below Redirect Rules for the same.

RewriteEngine On
RewriteCond %{HTTPS} off [OR]
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteCond %{HTTP_HOST} ^(?:www\.)?(.+)$ [NC]
RewriteRule ^ https://www.%1%{REQUEST_URI} [L,NE,R=301]

SSL certificate

2011-09-21T03:03:00.000-07:00

First we need to create a private key. Note that this process will require a passphrase for the key - don't worry, we'll remove it later to make things easier:

openssl genrsa -des3 -out myssl.key 1024

As said, this will require you to enter a passphrase.

CSR

Now we need to create a CSR (Certificate Signing Request):

openssl req -new -key myssl.key -out myssl.csr

The process will ask for various details for the certificate. I entered the following for each question:
Country Name: GB
State or Province Name: Nottinghamshire
Locality Name: Nottingham
Organization Name: PickledOnion Ltd
Organizational Unit Name: Web Development
Common Name: admin.domain.com
Email Address: webadmin@domain.com
For the 'extra' attributes I simply pressed 'return' (i.e. I left them blank).
Note: For the Common Name I entered the domain name I want to associate with the certificate. In this case I want it for my administration area so I entered 'admin.domain.com'.
You are not restricted to using the certificate with just that domain but it will produce extra warnings if the Common Name does not match the URI.

Remove Passphrase

When we generated the myssl.key file, we had to enter a passphrase. One disadvantage of this is the need to enter the passphrase if the Slice is rebooted.
This is especially problematic if an unexpected reboot occurs as the boot sequence will simply stop until you enter the console via the SliceManager and enter it.
So unless you see a particular need to keep the passphrase, let's remove it:

cp myssl.key myssl.key.org
openssl rsa -in myssl.key.org -out myssl.key

You will be asked for the passphrase one last time to confirm it is a genuine request.
Now we have three files in the temp folder:

ls
...
myssl.csr  myssl.key  myssl.key.org

CRT

The last file we need generate is the actual ssl certificate:

openssl x509 -req -days 365 -in myssl.csr -signkey myssl.key -out myssl.crt

Good. Now we have the final piece in place as that generated our myssl.crt file.

Everything in its place

Now we need to copy the relevant files to the /etc/ssl/ directory.
First file to move is the certificate itself:

sudo cp myssl.crt /etc/ssl/certs/

and secondly, copy the key:

sudo cp myssl.key /etc/ssl/private/

Clean up

You are now free to delete the temp file and the four files we generated or, if you prefer, keep them around for a while until you know the ssl certificate works correctly.

Summary

Nginx requires more than the standard pem file that Apache is happy with. As such, we need to create a ssl key and a certificate file.
Once the files have been generated and moved to the /etc/ssl/ directory, we are now ready to configure Nginx to serve our domain from an HTTPS connection.

How to add Iptables in startup in ubuntu

2011-09-21T01:47:00.000-07:00

In Ubuntu There is no any service to start iptables like Redhat, Centos & Fedora. We can add iptables in startup using below instructions.

First open the required ports. See iptables.

      # sudo /sbin/iptables -A INPUT -p tcp --dport ssh -j ACCEPT

```
Let's Check your Iptables Rule..
```

      # sudo /sbin/iptables

Saving iptables

If you were to reboot your machine right now, your iptables configuration would disappear. Rather than type this each time you reboot, however, you can save the configuration, and have it start up automatically. To save the configuration, you can use iptables-save and iptables-restore.

Save your firewall rules to a file

      #sudo sh -c "/etc/iptables-save > /etc/iptables.rules"

Configuration on startup using /etc/network/interfaces

Modify the /etc/network/interfaces configuration file to apply the rules automatically. You will need to know the interface that you are using in order to apply the rules - if you do not know, you are probably using the interface eth0, although you should check with the following command first to see if there are any wireless cards:

      #iwconfig

```
Edit /etc/network/interfaces with your favourite editor.
```
```
 
```
When in the file, search for the interface you found, and at the end of the network related lines for that interface, add the line:
```
 
```
```
pre-up iptables-restore < /etc/iptables.rules
```
- You can also prepare a set of down rules, save them into second file /etc/iptables.downrules and apply it automatically using the above steps:
```
 
```
```
          post-down iptables-restore < /etc/iptables.downrules 
```
```
 
```

Magento - Admin login problem after fresh installation

2011-06-03T15:07:00.000-07:00

Many times it happens, that after fresh installation of magento we are unable to login with admin. Try the solution for the same.

1) Edit varien.php which located in /[Magento_Dir]/app/code/core/Mage/Core/Model/Session/Abstract/

2) Find out the below pattern & comment last three lines.

session_set_cookie_params(

$this->getCookie()->getLifetime(), $this->getCookie()->getPath()//, //$this->getCookie()->getDomain(), //$this->getCookie()->isSecure(), //$this->getCookie()->getHttponly()
);

3) Now try to login with admin user

Step-by-step configuration of MySQL Replication

2011-06-03T12:29:00.000-07:00

Environment:

Master : 192.168.0.2
Slave : 192.168.0.3

MASTER CONFIGURATION

1) Login to MySQL with root user & Create a user for replication.

GRANT REPLICATION SLAVE ON *.* TO 'slave_user'@'%' IDENTIFIED BY 'your_password';
FLUSH PRIVILEGES;

2) Edit your my.cnf on master & add below lines in [mysqld] section

log-bin = /home/mysql/logs/mysql-bin.log
binlog-do-db=my_database
server-id=1

3) Restart master server

/etc/rc.d/init.d/mysqld restart

Configuring the Slave

1) Edit my.cnf

server-id=2
master-host=128.0.0.1
master-connect-retry=60
master-user=slave_user
master-password=slave_password
replicate-do-db=my_database

2) Restart MySQL Service

/etc/init.d/mysqld restart

3) Again login to mysql On the Master...

mysql > FLUSH TABLES WITH READ LOCK;

mysql > SHOW MASTER STATUS;

+---------------------+----------+-------------------------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+---------------------+----------+-------------------------------+-----------------+
| mysql-bin.000001 | 98 | my_database | |
+---------------------+----------+-------------------------------+------------------+

You need this info while starting slave So copy it somewhere.

5) Take a DBdump from master & copy it to slave

6) login to MySQL On the Slave

mysql > stop slave;
mysql > CREATE DATABASE `my_database`;

7) Import Ur master dump

8) Login to MySQL on slave.

mysql > CHANGE MASTER TO MASTER_HOST='192.168.0.2', MASTER_USER='slave_user', MASTER_PASSWORD='slave_password', MASTER_LOG_FILE='mysql-bin.000001', MASTER_LOG_POS=98;

slave start;

9) Back on the Master, log in to mysql & unlock the tables.
mysql > unlock tables;

10) Here we completed mysql replication configuration Now change any field in "my_database" on Master server, It will reflect on slave server.