Open terminal and execute below command

• curl -fsSL https://pkg.jenkins.io/debian-stable/jenkins.io-2023.key | sudo tee /usr/share/keyrings/jenkins-keyring.asc > /dev/null

• echo deb [signed-by=/usr/share/keyrings/jenkins-keyring.asc] https://pkg.jenkins.io/debian-stable binary/ | sudo tee /etc/apt/sources.list.d/jenkins.list > /dev/null

• sudo apt-get update

• sudo apt-get install fontconfig openjdk-11-jre

• sudo apt-get install jenkins

• sudo systemctl enable jenkins
• sudo systemctl start jenkins
• sudo systemctl status jenkins

sudo cat /var/lib/jenkins/secrets/initialAdminPassword

Follow below steps to upgrade Jenkins instance to latest

• sudo /etc/init.d/jenkins stop

• cd /usr/share/jenkins
• sudo mv jenkins.war jenkins.war.old

• sudo wget https://updates.jenkins-ci.org/latest/jenkins.war

• sudo /etc/init.d/jenkins start

• sudo apt-get update
• sudo apt-get install openjdk-19-jdk

• java -version

Download maven zip file from below URL

• mkdir tools
• cd tools
• wget https://dlcdn.apache.org/maven/maven-3/3.9.4/binaries/apache-maven-3.9.4-bin.zip
• unzip apache-maven-3.9.4-bin.zip

• git clone

• git branch

• git checkout

• git checkout -b

• git push -u origin

• git push

• git pull

• git commit -m "Comment here"

• git add filename

• git rm --cached filename

• git reset --hard

• https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-22-04

• docker run -d --name sonarqube -p 9000:9000 -p 9092:9092 sonarqube