Git

Maven

Jenkins

Docker

Kubernetes

Helm

Shell script

Linux commands

Ansible

Terraform

Part - 1 : How to create Github account and repositories

How to commit and push the changes to github

Difference between Pull vs Fetch

How to create and merge branches

How to create Pull Request in Github

How to fix merge conflict during git pull

How to fix merge conflict in Pull Request

How to reset the committed changes

How to create, list and delete Tag

How to create, list and delete Stash

What is git rebase and how to use it

Issues Faced

Tutorials

How to install Jenkins

How to install plugins in Jenkins

Use of Global Tool Configuration in Jenkins

How to store credentials in Jenkins

How to restore deleted job in Jenkins

Pipeline

How to create pipeline job in Jenkins

How to write a Jenkinsfile

[Part-1] Jenkinsfile to build a maven project

[Part-2] Jenkinsfile to build and deploy to Tomcat

[Part-3] Jenkinsfile to build docker image, push to dockerhub and deploy to same server

[Part-4] Jenkinsfile to build docker image, push to dockerhub and deploy to different server

How to define Environment varibles in Jenkinsfile

How to define parallel stage in Jenkinsfile

How to define triggers in Jenkinsfile

Integration with AWS

How to configure AWS Credentials in Jenkins

How to Deploy a docker compose to Amazon ECS using Jenkins

Monitoring

How to Monitor Jenkins With Grafana and Prometheus

Tutorials

Dockerfile best practices

How to write a dockerfile for installing packages

How to write a dockerfile for installing openjdk15

How to create multi stage Dockerfile

How to write a dockerfile for running a java application (*.war) in Apache tomcat webserver

Notes

Devops tools as docker containers

Docker Advanced Topics

Linux kernal feature - namespace

Linux chroot

Linux cgroups

Application Deployment

How to deploy 3 tier application in Kubernetes

Kubeconfig File

How to use service account in kubeconfig file for authentication

Cert-manager

How to install/uninstall cert-manager in kubernetes

Ingress

How to install Nginx Ingress controller in Kubernetes

Kubernetes Migration

Tinder move to Kubernetes

Shell script

Basics

Environment variables

How to read a value from user

Special variables

IFS effects on special variables

How to use 'cat'

How to use 'awk'

How to use 'sed'

How to use 'cut'

How to use 'uniq'

How to use 'sort'

How to use 'grep'

How to use 'find'

How to use 'jq'

How to use 'trap'

How to use 'crontab'

How to use 'let'

How to use 'wait'

How to use 'sleep'

How to use 'tee'

How to use 'xargs'

References

How to use Firewalld service to enable/disable port in Linux machine

How to use journalctl command to see the logs of running services in linux machine

Tutorials

How to install Tomcat

How to manually deploy the java application to Tomcat 9 webserver

How to deploy the java application to Tomcat 9 webserver using maven

Freenom Domain Registrar

How to purchase a free domain using freenom domain registrar

How to add a DNS record in freenom domain registrar

Let’s Encrypt SSL/TLS Certificates

How to configure Free Let’s Encrypt SSL/TLS Certificate with NGINX and autorenew certificate

How to configure Free single Let’s Encrypt SSL/TLS Certificate with NGINX for multiple subdomains and autorenew certificate

How to configure free single Let’s Encrypt SSL/TLS wildcard Certificate with NGINX

Selfsigned SSL/TLS certificate

self signed certificate using openssl

Tutorials

Sonarqube Quality gate in Jenkins

Notes

Updating soon!!