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$JENKINS_HOME is where all Jenkins-based installations store configuration, build logs, and artifacts.
The Jenkins home directory contains all the details of your Jenkins server configuration, details that you configure in the Manage Jenkins screen. These configuration details are stored in the form of a set of XML files. Many of the core configurations are stored in the config. xml file.
By default Jenkins home directory ( JENKINS_HOME ) is set to ~/. jenkins , this is the location where you can find your Jenkins XML config file. On Windows your user home directory is under C:\Users\USERNAME (equivalent to %HOME% ).
Jenkins stores some of the related builds data like the following:
The working directory is stored in the directory {JENKINS_HOME}/workspace/.
{JENKINS_HOME}/workspace/{JOBNAME}
The configuration for all jobs stored in the directory {JENKINS_HOME}/jobs/.
Each job store its related builds data in the directory
{JENKINS_HOME}/jobs/{JOBNAME}
Each job folder contains:
The job configuration file is {JENKINS_HOME}/jobs/{JOBNAME}/config.xml
The job builds are stored in {JENKINS_HOME}/jobs/{JOBNAME}/builds/
See the Jenkins documentation for a visual representation and further details.
JENKINS_HOME
+- config.xml (jenkins root configuration)
+- *.xml (other site-wide configuration files)
+- userContent (files in this directory will be served under your http://server/userContent/)
+- fingerprints (stores fingerprint records)
+- nodes (slave configurations)
+- plugins (stores plugins)
+- secrets (secretes needed when migrating credentials to other servers)
+- workspace (working directory for the version control system)
+- [JOBNAME] (sub directory for each job)
+- jobs
+- [JOBNAME] (sub directory for each job)
+- config.xml (job configuration file)
+- latest (symbolic link to the last successful build)
+- builds
+- [BUILD_ID] (for each build)
+- build.xml (build result summary)
+- log (log file)
+- changelog.xml (change log)
On Linux one can find the home directory of Jenkins looking for a file, that Jenkins' home contains, e.g.:
$ find / -name "config.xml" | grep "jenkins"
/var/lib/jenkins/config.xml
Jenkins 1.627, OS X 10.10.5
/Users/Shared/Jenkins/Home/jobs/{project_name}/config.xml
The best approach would be to keep your job configurations in a Jenkinsfile that live in source control.
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