Backup files are in the
tar+gzip format, with file names relative to the Jenkins home directory. Example of restoring a backup using Linux (GNU tar) syntax:
$ cd $$JENKINS_HOME $ tar xvfz /backups/jenkins/backup-daily-13.tar.gz config.xml jobs/myjob/config.xml ...
$$JENKINS_HOME is relocatable, meaning you don’t have to restore the backup into the same instance it was created from. This allows you to exercise the backup restore steps by creating a different Jenkins
instance on your own computer and restoring things there.
Move all the contents of the existing
$JENKINS_HOMEto a different location.
$JENKINS_HOMEbackup to the now empty directory.