What to backup in Jenkins

You can backup the whole $JENKINS_HOME directory, but the most important are:

• $JENKINS_HOME/*.xml - configuration files (Ex. config.xml)
• $JENKINS_HOME/jobs/*/*.xml - jobs folder - if you want to save your CICD pipelines
• $JENKINS_HOME/nodes/* - agent configuration
• $JENKINS_HOME/plugins/*.jpi - Plugins installed
• $JENKINS_HOME/secrets/* - Secrets for credentials
• $JENKINS_HOME/users/* - users folder

Also, you can use this script to do the above: jenkins=backup-script