By default, Jenkins stores all of its data in this directory on the file system.
Under the Advanced section, you can choose to store build workspaces and build records elsewhere.

There are a few ways to change the Jenkins home directory:

- Edit the `JENKINS_HOME` variable in your Jenkins configuration file (e.g. `/etc/sysconfig/jenkins` on Red Hat Linux).
- Use your web container's admin tool to set the `JENKINS_HOME` environment variable.
- Set the environment variable `JENKINS_HOME` before launching your web container, or before launching Jenkins directly from the WAR file.
- Set the `JENKINS_HOME` Java system property when launching your web container, or when launching Jenkins directly from the WAR file.
- Modify `web.xml` in `jenkins.war` (or its expanded image in your web container). This is not recommended.

This value cannot be changed while Jenkins is running.
It is shown here to help you ensure that your configuration is taking effect.