bash devops.txt

1.	Perform GIT operations on local remote repositories. (Create Repository, add files. Commit changes, pushing objects to remote repository)

mkdir filename

cd filename

git init

nano filename2.txt

git status

git add filename2.txt

git commit -m "Initial commit Added by me"

git remote add origin <GitHub link>

git push -u origin master


2.	Perform GIT operations on local remote repositories.(Create Repository, add files, create branches, switch between branches)


mkdir filename

cd filename

git init

nano filename2.txt

git add .

git commit -m "This is first commit"

git branch branch1

git branch

git checkout branch1

git branch

git switch master

git branch



3.	Perform  GIT operations on Remote repositories (Create Repository, add files. Commit changes, cloning, pulling and pushing  objects)


git clone <GitHub link>

mkdir filename

cd filename

git init

nano filename2.txt

git add .

git commit -m "Initial commit"

git push -u origin main

git pull origin main








4.	Build the Java jobs using in Jenkins
Build the Java Job using Jenkins
Step 1:
Create a Java file → sample.java
public class sample {
    public static void main(String[] args) {
        System.out.println("Hello Java in Jenkins!");
    }
}
Step 2:
Open Jenkins → http://localhost:8080/
Step 3:
New Item → Freestyle Project → give name: JavaJob
Step 4:
Go to Build → Add build step → Execute Windows batch command
Type:
javac sample.java
java sample
Step 5:
Click Save → Build Now
Step 6:
Check Console Output → you should see:
Hello Java in Jenkins!





5.	Build the python jobs using in Jenkins
Step 1:
Create Python file → sample.py
print("Hello Python in Jenkins!")
Step 2:
New Item → Freestyle Project → give name: PythonJob
Step 3:
Go to Build → Add build step → Execute Windows batch command
Type:
python sample.py
Step 4:
Click Save → Build Now
Step 5:
Check Console Output → you should see:
Hello Python in Jenkins!



6.	Crete a simple pipeline script using Jenkins

Step 1:
pipeline {
    agent any

    stages {
        stage('Git Checkout') {
            steps {
                git branch: 'main', url: 'https://github.com/ganeshghutukade-04/gitdemo.git'
            }
        }

        stage('Build Java') {
            steps {
                script {
                    if (fileExists('sample.java')) {
                        bat 'javac sample.java'
                        bat 'java sample'
                    } else {
                        echo 'No Java file found.'
                    }
                }
            }
        }

        stage('Run Python') {
            steps {
                script {
                    if (fileExists('sample.py')) {
                        bat 'python sample.py'
                    } else {
                        echo 'No Python file found.'
                    }
                }
            }
        }
    }

    post {
        success {
            echo 'Pipeline completed successfully!'
        }
        failure {
            echo 'Pipeline failed. Check errors above.'
        }
    }
}

Step 3:
Click Save → Build Now
Step 4:
Check Console Output → output from both Java and Python programs will appear (if files exist).



7. docker


docker version
docker info
docker images
docker image ls
docker ps
docker ps -a
docker pull ubuntu
docker inspect ubuntu
docker rmi ubuntu