fosshelp

How to Install and Setup Django on Ubuntu 20.04 18.04

2020-05-24T02:14:00.001+05:30

sudo apt-get python3-pip

python3 -V
pip3 -V

pip3 install django
ls /home/anna/.local/bin
export PATH=$PATH:/home/anna/.local/bin
django-admin --version

django-admin startproject myapp
cd myapp
python3 manage.py migrate

python3 manage.py createsuperuser

vi myapp/settings.py
ALLOWED_HOSTS = ['ip-address-of-server']

python3 manage.py runserver 0.0.0.0:8000

How to Install Certbot and Generate Let’s Encrypt SSL or TLS Certificate on Ubuntu 20.04 18.04

2020-05-24T01:37:00.001+05:30

sudo apt install certbot
#sudo apt install python3-certbot-nginx
#sudo apt install python3-certbot-apache

#sudo certbot --nginx --agree-tos --redirect --hsts --staple-ocsp --email you@mail.com -d mydomain.com
#sudo certbot-auto certonly --standalone -d mydomain.com -d www.mydomain.com

#ls /etc/letsencrypt/live/mydomain.com
#fullchain.pem
#privkey.pem

#vi /etc/nginx/sites-available/mydomain.conf
#ssl on;
#ssl_certificate /etc/letsencrypt/live/mydomain.com/fullchain.pem;
#ssl_certificate_key /etc/letsencrypt/live/mydomain.com/privkey.pem;

--nginx: Use the nginx plugin.
--apache: Use the Apache plugin.
--agree-tos: Agree to terms of service.
--redirect: Force HTTPS by 301 redirect.
--hsts: Add the Strict-Transport-Security header to every HTTP response. Forcing browser to always use TLS for the domain. Defends against SSL/TLS Stripping.
--staple-ocsp: Enables OCSP Stapling. A valid OCSP response is stapled to the certificate that the server offers during TLS.

python distutils get_command_list

2020-05-09T23:08:00.002+05:30

>>> from distutils import dist
>>> p = dist.Distribution()
>>>
>>>
>>> p.get_command_list()
[('build', 'build everything needed to install'), ('build_py', '"build" pure Python modules (copy to build directory)'), ('build_ext', 'build C/C++ extensions (compile/link to build directory)'), ('build_clib', 'build C/C++ libraries used by Python extensions'), ('build_scripts', '"build" scripts (copy and fixup #! line)'), ('clean', "clean up temporary files from 'build' command"), ('install', 'install everything from build directory'), ('install_lib', 'install all Python modules (extensions and pure Python)'), ('install_headers', 'install C/C++ header files'), ('install_scripts', 'install scripts (Python or otherwise)'), ('install_data', 'install data files'), ('sdist', 'create a source distribution (tarball, zip file, etc.)'), ('register', 'register the distribution with the Python package index'), ('bdist', 'create a built (binary) distribution'), ('bdist_dumb', 'create a "dumb" built distribution'), ('bdist_rpm', 'create an RPM distribution'), ('bdist_wininst', 'create an executable installer for MS Windows'), ('upload', 'upload binary package to PyPI'), ('check', 'perform some checks on the package')]
>>>
>>>

How to Deploy App on Minikube

2020-05-09T14:02:00.000+05:30

curl https://raw.githubusercontent.com/kubernetes/helm/master/scripts/get-helm-3 > get_helm.sh
chmod 700 get_helm.sh
./get_helm.sh

helm repo list
helm repo add bitnami https://charts.bitnami.com/bitnami
helm repo list
helm install redis bitnami/redis

helm delete redis
helm repo remove bitnami

How to Install Minikube on Ubuntu 20.04 18.04

2020-05-09T14:01:00.000+05:30

Install VirtualBox:
sudo apt-get install -y virtualbox

Install kubelet:
curl -Lo kubectl https://storage.googleapis.com/kubernetes-release/release/v1.5.1/bin/linux/amd64/kubectl
chmod +x kubectl
sudo mv kubectl /usr/local/bin/kubectl

curl -Lo minikube https://github.com/kubernetes/minikube/releases/download/v1.9.2/minikube-linux-amd64
chmod +x minikube
sudo mv minikube /usr/local/bin/

minikube start --vm-driver virtualbox

Show minikube cluster IP
minikube ip

kubectl get pods --all-namespaces
kubectl config view
minikube addons list

Stopping a Cluster Minikube
minikube stop

minikube delete

Minikube Logs
minikube logs

Dashboard
minikube dashboard

minikube version

How to Install Helm with Minikube

2020-05-09T13:59:00.002+05:30

How to Uninstall Docker or Docker CE on Ubuntu 20.04

2020-05-08T17:22:00.004+05:30

sudo apt-cache policy docker*
sudo apt-cache policy docker.io
sudo apt purge docker.io
sudo apt autoremove

sudo apt-cache policy docker*
sudo apt-cache policy docker-ce
sudo apt purge docker-ce
sudo apt autoremove

How to Install docker on Ubuntu 20.04

2020-05-08T17:21:00.004+05:30

sudo apt update
sudo apt install docker.io
sudo systemctl enable --now docker
sudo systemctl start docker
sudo systemctl status docker
docker --version
docker run hello-world

How to Install Docker CE on Ubuntu 20.04

2020-05-08T17:21:00.001+05:30

sudo apt install apt-transport-https ca-certificates curl gnupg-agent software-properties-common

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

sudo bash -c 'echo "deb [arch=amd64] https://download.docker.com/linux/ubuntu eoan stable" > /etc/apt/sources.list.d/docker-ce.list'

sudo apt-get update
sudo apt-cache policy docker-ce
sudo apt-get install -y docker-ce
sudo systemctl status docker

go golang rename all imports

2020-01-29T00:18:00.004+05:30

rename all
github.com/xxxx
to
gitlab.com/yyyy

$ find -type f -exec ex -sc '%s/github.com\/xxxx/gitlab.com\/yyyy/g' -cx {} ';'

Android Studio and Firebase How to add Fingerprint

2020-01-03T19:40:00.002+05:30

1)
Install JDK

2)
$ cd C:\Program Files\Java\jdk-13.0.1\bin

$ keytool -exportcert -list -v -alias androiddebugkey -keystore %USERPROFILE%\.android\debug.keystore

3)
Copy SHA1 or SHA256

4)
goto https://console.firebase.google.com/
goto https://console.firebase.google.com/project//settings/general/

* Then "Add Fingerprint"

How To Install and Use Docker on Ubuntu 18.04

2019-12-09T16:12:00.003+05:30

sudo apt update

2)

sudo apt install apt-transport-https ca-certificates curl software-properties-common

3)

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

4)

sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu bionic stable"

5)

sudo apt update

6)

apt-cache policy docker-ce

7)

sudo apt install docker-ce

8)

sudo systemctl status docker

9)

docker info

10)

docker run hello-world

How to install Docker Compose on ubuntu 18.04

2019-12-09T16:10:00.001+05:30

sudo curl -L https://github.com/docker/compose/releases/download/1.21.2/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose

2)

sudo chmod +x /usr/local/bin/docker-compose

3)

docker-compose --version

4)

mkdir dctest

cd dctest

vim docker-compose.yml

my-test:
 image: hello-world

5)

docker-compose up

Kubernetes Access Service located in another Namespace

2019-12-07T13:42:00.003+05:30

sajuptpm@cloudshell:~$
sajuptpm@cloudshell:~$
sajuptpm@cloudshell:~$ kubectl get services
NAME                                 TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGE
jenkins-1-jenkins-agents-connector   ClusterIP   10.15.241.134           50000/TCP        192d
jenkins-1-jenkins-ui                 NodePort    10.15.248.131           8080:32551/TCP   192d
kubernetes                           ClusterIP   10.15.240.1             443/TCP          192d
sajuptpm@cloudshell:~$
sajuptpm@cloudshell:~$
sajuptpm@cloudshell:~$
sajuptpm@cloudshell:~$ kubectl get services -n kube-system
NAME                   TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)         AGE
default-http-backend   NodePort    10.15.254.200           80:32596/TCP    192d
heapster               ClusterIP   10.15.254.154           80/TCP          192d
kube-dns               ClusterIP   10.15.240.10            53/UDP,53/TCP   192d
metrics-server         ClusterIP   10.15.249.48            443/TCP         192d
tiller-deploy          ClusterIP   10.15.247.88            44134/TCP       151d
sajuptpm@cloudshell:~$
sajuptpm@cloudshell:~$

kubectl exec -it jenkins-1-jenkins-deployment-5fc5855c54-dswcq -- /bin/sh

curl http://heapster.kube-system.svc.cluster.local

curl http://jenkins-1-jenkins-ui.default.svc.cluster.local:8080
curl http://jenkins-1-jenkins-ui:8080

How can I edit a Kubernetes Deployment without modify the file manually

2019-12-07T13:22:00.003+05:30

kubectl edit deployment jenkins-1-jenkins-deployment

kubectl edit pod jenkins-1-jenkins-deployment-5fc5855c54-dswcq

How to find Kubernetes Pods Host IP or Node IP address

2019-12-07T13:20:00.000+05:30

kubectl get pod --output=wide

kubectl get pod --output=json | grep hostIP

kubectl get pod --output=json | grep podIP

How to find Kubernetes Pods IP address

2019-12-07T13:19:00.002+05:30

kubectl get pod --output=wide

kubectl get pod --output=json | grep podIP

kubectl get pod --output=json | grep hostIP

How do I edit a resource configuration with kubectl

2019-12-07T13:05:00.001+05:30

kubectl edit pod jenkins-1-jenkins-deployment-5fc5855c54-dswcq

kubectl edit deployment jenkins-1-jenkins-deployment

Kubernetes List all resources in a namespace

2019-12-07T12:50:00.002+05:30

kubectl api-resources -n kube-system

kubectl api-resources

Kubernetes sort pods by age or creation time

2019-12-07T12:44:00.000+05:30

$ kubectl get pods --sort-by=.metadata.creationTimestamp -n kube-system

$ kubectl get pods --sort-by=.metadata.creationTimestamp -n kube-system --output=wide

Kubernetes gets all Pods on specific node

2019-12-07T04:19:00.001+05:30

kubectl get pods --all-namespaces -o wide --sort-by="{.spec.nodeName}"

2)

kubectl get pods --all-namespaces -o wide --field-selector spec.nodeName=

How to debug OpenStack Metadata Service - neutron metadata proxy

2019-12-06T04:01:00.001+05:30

1)
# grep shared_secret /etc/nova/nova.conf
neutron_metadata_proxy_shared_secret=xxxxxxxxxxxxxx #default to ""

2)
import hmac
import hashlib

secret = ""
instance_id = "34361309-1873-476b-9258-b8fe2184a4d8"

hmac.new(secret, instance_id, hashlib.sha256).hexdigest()

0175b5cbd28c2d0512d3f1d3a7b5bacf6d6b6a8a4bdaebf56568a454f94bd5a6

3)
curl \
-H 'x-instance-id: 34361309-1873-476b-9258-b8fe2184a4d8' \
-H 'x-tenant-id: 66cbc35f0b99430987357c2526945f8b' \
-H 'x-instance-id-signature: 0175b5cbd28c2d0512d3f1d3a7b5bacf6d6b6a8a4bdaebf56568a454f94bd5a6' \
http://172.16.12.5:8775/latest/meta-data

ami-id
ami-launch-index
ami-manifest-path
block-device-mapping/
hostname
instance-action
instance-id
instance-type
local-hostname
local-ipv4
placement/
public-hostname
public-ipv4
reservation-id

4)
curl \
-H 'x-instance-id: 34361309-1873-476b-9258-b8fe2184a4d8' \
-H 'x-tenant-id: 66cbc35f0b99430987357c2526945f8b' \
-H 'x-instance-id-signature: 0175b5cbd28c2d0512d3f1d3a7b5bacf6d6b6a8a4bdaebf56568a454f94bd5a6' \
http://172.16.12.5:8775/latest/meta-data/local-ipv4

10.10.1.253

How to Decode or Decrypt OpenStack Keystone Token

2019-12-06T02:38:00.001+05:30

sudo python

import keystone

from keystone.token import token_formatters

formatter = token_formatters.TokenFormatter()

t = "gAAAAABd6Wl0RnnFOcy-q6aFWlr__bDcxk-GFFrLZsDh3z38Abg0iH5yFOJP7QyOVZ1SUhlIqxgID89hsZnubsM5hsbQSsYLujhU1_Zz9hlowb0chks9mogf4Pp9f1JFkr3FVQaCv2MN-ykpARLSpoV9c3m-7EFASaUNwMgysXC734598mKmWbI"

from keystone import server
server.configure()

validated_dict = formatter.validate_token(t)

validated_dict

>>> validated_dict
('a647d82c28aa4267bcf2ea99c328cd48', ['password'], [u'd6yYRIWASaKrjKTRwoGyNA'], None, None, '66cbc35f0b99430987357c2526945f8b', None, None, None, None, None, None, '2019-12-05T21:38:53.000000Z', '2019-12-05T22:38:53.000000Z')
>>>

How to Install cordova and ionic on Ubuntu 19.04 18.04 Debian Linux Mint

2019-06-12T17:17:00.004+05:30

sudo apt update

sudo apt install nodejs
sudo apt install npm

nodejs -v
npm -v

sudo npm install cordova
sudo npm install ionic

ionic -v
cordova -v

ionic start myApp sidemenu

ionic serve

access http://127.0.0.1:8100

How to resize kubernetes cluster

2019-06-09T04:04:00.004+05:30

gcloud container clusters list

kubectl get nodes

gcloud container clusters resize sacluster1 --num-nodes 7

gcloud container clusters list

kubectl get nodes