Computer Bapu

NPM and docker installation and few commands

noreply@blogger.com (Computer Bapu) — Fri, 03 Dec 2021 07:11:00 +0000

NPM Installation

================

sudo apt install nodejs

sudo apt install npm

nodejs -v

(version)

npm -v

(Version)

sudo apt install build-essential

(install build essentials in case you want to compile code from source -- just to be make sure)

An alternative to installing Node.js with apt is to use a tool called nvm, which stands for “Node.js Version Manager”. Rather than working at the operating system level, nvm works at the level of an independent directory within your home directory. This means that you can install multiple self-contained versions of Node.js without affecting the entire system.

Docker installation

====================

sudo apt install docker.io

docker -v

(version)

Just in case apt fails to install docker there is an alternative to intall snap and install docker from there... also to know about snap google it

sudo apt install snap

sudo snap install docker

[some handy commands] ...google for more

docker run hello-world

docker images

docker ps -a

docker ps

docker build ./

docker run -tid -p 8083:90 --name "work" a334445434

docker exec -it kantil bash

docker cp /root/var/www/html/test.php work:/var/www/html

docker exec 74f86665f0fd ls

chmod -R 755 /var/www/html

dockerfile basic example with apache and php php:7.4-apache

noreply@blogger.com (Computer Bapu) — Thu, 02 Dec 2021 08:48:00 +0000

Create a docker file

FROM php:7.4-apache

RUN echo "Building the Image"

COPY /var/www/html /var/www/html

RUN chmod -R 755 /var/www/html

EXPOSE 80

Rest of the commands

docker build ./

docker run -tid -p 8083:90 --name "work" a334445434

docker exec -it kantil bash

(exit to get out of bash)

This wont sync files dynamically into container after changes - but only onces

Run php page inside docker container using docker commands

noreply@blogger.com (Computer Bapu) — Wed, 01 Dec 2021 13:41:00 +0000

Run php page inside docker container using docker commands

===========================

docker run -tid -v /root/var/www/html:/var/www/html -p 8080:80 --name="phpserver" php:7.4-apache

(you have to upload a test.php file in /html location and image is downloaded automatically if not available for php:7.4-apache)

docker ps

(above to get container id as container is created)

(gives file permisson -- but have to run everytime if you modify test.php or any other file in html folder)

docker exec 20ea72577d44 chmod -R 755 /var/www/html

Run in url : http://[your local host address]/test.php

Autocomplete using jquery javascript snippet

noreply@blogger.com (Computer Bapu) — Fri, 31 Jan 2020 15:43:00 +0000

//please correct the angular brackets
< link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css" />
< script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js">

< script src="http://code.jquery.com/jquery-1.9.1.js">

< script >
$(function() {
var contentvalues=[{"state":"AL","value":"Autauga","zipcode":"36003","county":"01001"},{"state":"AL","value":"Baldwin","zipcode":"36507","county":"01003"}]

var jsonObj = [];
$.each(contentvalues, function(index) {
item = {}
item ["state"] = contentvalues[index].state;
item ["value"] = contentvalues[index].value + ' - ' + contentvalues[index].state;
item ["zipcode"] = contentvalues[index].zipcode;
item ["county"]= contentvalues[index].county;
item ["countyname"]= contentvalues[index].value;
jsonObj.push(item);

});

$( "#searchbox" ).autocomplete({
minLength: 3,
source: jsonObj,
focus: function( event, ui ) {
$( "#searchbox" ).val( ui.item.value );
return false;
},

select: function( event, ui ) {
var state=ui.item.state;
var county=ui.item.county;
var zipcode=ui.item.zipcode;
var countyname=ui.item.countyname;

var url='https://www.yoursite.com/?state=' + state + '&countyname=' + countyname + '&zipcode='+ zipcode + '&county=' + county;
window.location.href = url;
return false;

}

});
});

</ script >

< form action="search" method="post" >
< input name="searchbox" id="searchbox" />
< /form >

nice tool to make charts, maps and tables

noreply@blogger.com (Computer Bapu) — Thu, 30 Jan 2020 08:49:00 +0000

You can use this free online tool to publish stories
https://www.datawrapper.de/

handy aws amazon rekognition snippets

noreply@blogger.com (Computer Bapu) — Thu, 30 Jan 2020 05:33:00 +0000

These are handy amazon rekognision snippets. Make sure you have loaded the aws sdk from amazon for php

I have developed such applications and utilized these stuffs in php and python. Its pretty straight forward.

Snippets below!

Create collection

$result = $client->createCollection([
'CollectionId' => 'mycollectionid',
]);

Results

[
'CollectionArn' => 'aws:rekognition:us-west-

2:13234342323:collection/mycollectionid',
'StatusCode' => 200,
]

Index faces
$result = $client->indexFaces([
'CollectionId' => 'myphotos',
'DetectionAttributes' => [
],
'ExternalImageId' => 'myphotoid',
'Image' => [
'S3Object' => [
'Bucket' => 'mybucket',
'Name' => 'myphoto',
],
],
]);

$result = $rekognitionClient->searchFacesByImage([
'CollectionId' => ''.$collection_id.'', // REQUIRED
'FaceMatchThreshold' => 25.0,
'Image' => [ // REQUIRED
'S3Object' => [
'Bucket' => 'facetracking',
'Name' => 'test.jpg',
'Key' => 'test.jpg',
'Version' => 'latest',
],
], 'MaxFaces' => 2,
]);

Video

$result = $client->startFaceDetection([
'ClientRequestToken' => '',
'FaceAttributes' => 'DEFAULT|ALL',
'JobTag' => '',
'NotificationChannel' => [
'RoleArn' => '', // REQUIRED
'SNSTopicArn' => '', // REQUIRED
],
'Video' => [ // REQUIRED
'S3Object' => [
'Bucket' => '',
'Name' => '',
'Version' => '',
],
],
]);

$result = $client->getFaceDetection([
'JobId' => '', // REQUIRED
'MaxResults' => ,
'NextToken' => '',
]);
GetFaceDetection returns an array of detected faces (Faces) sorted by the

time the faces were detected.

$result = $client->getFaceSearch([
'JobId' => '', // REQUIRED
'MaxResults' => ,
'NextToken' => '',
'SortBy' => 'INDEX|TIMESTAMP',
]);

make you android phone a webcam or ipcamera

noreply@blogger.com (Computer Bapu) — Thu, 30 Jan 2020 05:30:00 +0000

you can easily make your old/new android phone a webcamera

Step 1. Install DroidCam Wireless Webcam app on your Android smartphone
Step 2. Install the DroidCam Client app on your Windows PC
or you can directly run the browser cam address on browser directly

Also if the webcam is on its also detected in other softwares as long as windows client is on! I have tested it using the windows client and also via web.

Search Google for droidcam wireless webcam apk and you will get the download link easily. It hardly takes 5 minutes to setup

Ref:

https://www.digitalcitizen.life/turn-android-smartphone-webcam-windows

simple csv reader in python

noreply@blogger.com (Computer Bapu) — Sat, 18 Jan 2020 14:34:00 +0000

import csv
datafile = open('touristspot-final.csv', 'r')
myreader = csv.reader(datafile)

for row in myreader:
print(row[0], row[1], row[2])

Please make sure to install csv package in python.

install nvm in udumbu

noreply@blogger.com (Computer Bapu) — Sat, 18 Jan 2020 14:30:00 +0000

apt-get update
apt-get install build-essential libssl-dev

curl https://raw.githubusercontent.com/creationix/nvm/v0.25.0/install.sh | bash

Ref:
https://github.com/creationix/nvm/releases (see version latesT)
Ref: https://www.liquidweb.com/kb/how-to-install-nvm-node-version-manager-for-node-js-on-ubuntu-12-04-lts/
Ref:
https://www.sitepoint.com/quick-tip-multiple-versions-node-nvm/

Install Jquery module in your IONIC 3 app

noreply@blogger.com (Computer Bapu) — Sat, 18 Jan 2020 12:49:00 +0000

Install Jquery module in your IONIC-3 app,

npm install jquery --save
npm install @types/jquery
Import JQuery in HomePage.ts

import * as $ from "jquery";

Use $ to call jquery methods.

ngAfterViewInit(){
$(document).ready(function(){
alert('JQuery is working!!');
});
}

Python selenium installation

noreply@blogger.com (Computer Bapu) — Sat, 18 Jan 2020 12:16:00 +0000

Make sure you have pip installed. Generally it comes with the package already.

Now install selenium
C:\Python34\Scripts\pip.exe install -U selenium
Later you have to download the browser driver (either for firefox or chrome etc) - just google it to get the location. The downloaded stuffs path needs to be used in python code.

Rest of the other related stuffs are as below -- used for data scraping
pip install beautifulsoup4

pip install requests

ionic installation

noreply@blogger.com (Computer Bapu) — Sat, 18 Jan 2020 12:12:00 +0000

* ionic start myApp tabs --type ionic1 // for ionic 1
ionic start myApp tabs --type ionic-angular // for ionic 2/3
ionic start myApp tabs --type angular // for ionic 4+

* npm install -g ionic
*https://ionicframework.com/getting-started/
ionic start myApp tabs
cd myApp
ionic serve

android cordova installation and set path command

noreply@blogger.com (Computer Bapu) — Sat, 18 Jan 2020 12:11:00 +0000

* install node from website
* npm install -g cordova
* npm install -g ionic
* install jdk oracle site jdk
* android studio or command line version
* sdkmanager "platform-tools" "platforms;android-23"
* sdkmanager "platform-tools" "platforms;android-24"
* cordova create hello com.example.hello HelloWorld
* set command for android path
*
set ANDROID_HOME=C:\Users\admin-new\Downloads\sdk-tools-windows-4333796\
set PATH=%PATH%;%ANDROID_HOME%\tools;%ANDROID_HOME%\platform-tools

(plz check paths)
set JAVA_HOME=D:\Program Files\Java\jdk1.8.0_221\
set PATH=%PATH%;

(working)
set PATH=%PATH%;D:\Program Files\Java\jdk1.8.0_221\bin
set PATH=%PATH%;C:\gradle\gradle-5.6.2\bin

* cordova platform update android@6.1.2

install nvm in mac

noreply@blogger.com (Computer Bapu) — Sat, 18 Jan 2020 12:07:00 +0000

install nvm using brew (mac)
brew install nvm
nvm ls-remote # find the version you want
nvm install v7.10.0
nvm alias default v7.10.0 # set default node version on a shell

New ionic 3 project startup

noreply@blogger.com (Computer Bapu) — Sat, 18 Jan 2020 12:07:00 +0000

New ionic 3 project
https://ionicframework.com/docs/cli/commands/start

ionic start
ionic start --list
ionic start myApp
ionic start myApp blank
ionic start myApp tabs --cordova
ionic start myApp tabs --capacitor
ionic start myApp super --type=ionic-angular
ionic start myApp blank --type=ionic1
ionic start cordovaApp tabs --cordova
ionic start "My App" blank
ionic start "Conference App" https://github.com/ionic-team/ionic-conference-app
Inputs

32 bit node.js installation

noreply@blogger.com (Computer Bapu) — Sat, 18 Jan 2020 12:06:00 +0000

nvm install 8.12.0 32 (32 bits)

multiple version of node installation

noreply@blogger.com (Computer Bapu) — Sat, 18 Jan 2020 12:05:00 +0000

* https://www.sitepoint.com/quick-tip-multiple-versions-node-nvm/
nvm ls-remote
nvm ls available (windows)

* see list of available node version in pc
nvm list

* install old version of node
nvm install 8.12.0

* Fortunately, when installing a new Node.js version, you can reinstall the npm global packages from a specific version. For example:

nvm install v9.0.0 --reinstall-packages-from=8.9

1) nvm to manage node versions
2) npm for packages

nvm use latest
npm install -g ionic

nvm use 8.12.0
npm uninstall -g ionic
npm install -g ionic@3.9.2

For library adding
npm install --save

--save adds to package

nvm install 8.12.0 32 (32 bits)

Gulp Meaning

noreply@blogger.com (Computer Bapu) — Sat, 18 Jan 2020 12:04:00 +0000

* gulp meaning

Gulp is a task runner that uses Node. js as a platform. It purely uses the JavaScript code and helps to run front-end tasks and large-scale web applications. Gulp builds system automated tasks like CSS and HTML minification, concatenating library files, and compiling the SASS files.

https://en.wikipedia.org/wiki/Gulp.js
https://www.tutorialspoint.com/gulp/index.htm

install nvm for windows

noreply@blogger.com (Computer Bapu) — Sat, 18 Jan 2020 12:03:00 +0000

download nvm for windows from
https://github.com/coreybutler/nvm-windows

After installation use some commands

nvm use 4.4.0
npm install gulp-cli -g
nvm use 0.10.33
npm install gulp-cli -g

Install Curl, apache, vesta control panel In Debian Linux

noreply@blogger.com (Computer Bapu) — Sat, 18 Jan 2020 11:47:00 +0000

Install Apache

sudo apt-get install apache2

Uninstall

sudo apt-get --purge remove apache2
sudo apt-get remove apache2-common

Install curl in debian linux

$sudo apt install curl

OR
$sudo apt-get install curl

How to install Vesta Control panel
1. Connect to your server as root via SSH
ssh root@your.server-name

2. Download installation script
curl -O http://vestacp.com/pub/vst-install.sh

3. Run it

bash vst-install.sh

pdf search engine - find pdf

noreply@blogger.com (Computer Bapu) — Sun, 21 Dec 2008 20:57:00 +0000

www.pdf-search-engine.com/

A great site to search pdf files

Return random rows using Sql query

noreply@blogger.com (Computer Bapu) — Sat, 29 Sep 2007 17:22:00 +0000

Return random rows using Sql query

SELECT TOP 5 * FROM album ORDER BY NEWID()

Reloading A Page in javascript

noreply@blogger.com (Computer Bapu) — Sat, 29 Sep 2007 17:22:00 +0000

Reloading A Page in javascript

location.reload();
reloading by preventing caching:location.search = "?" + Math.random();

Redirecting a browser using javascript

noreply@blogger.com (Computer Bapu) — Sat, 29 Sep 2007 17:20:00 +0000

Redirecting a browser using javascript

location.href = "newPage.html";

OR

<meta http-equiv="Refresh" content="X; URL=Y" />

OR

location.replace("newPage.html"); (This refreshes browser history)

prevent caching in javascript

noreply@blogger.com (Computer Bapu) — Sat, 29 Sep 2007 17:19:00 +0000

prevent caching in javascript

document.write("<img src=\"yourimage.gif?" + Math.random() + "\" />");

Here Math.random() is the key here since its always different per load and enforces a different version!!.

Math.random() returns a random number between 0 and 1 (Eg:0.something..)