Jenkins configuration spans controller settings, plugins, credentials, and pipeline-as-code definitions.
/var/lib/jenkins//var/lib/jenkins/config.xml/var/lib/jenkins/credentials.xml, /var/lib/jenkins/jobs//var/lib/jenkins/jenkins.yamlFor file or plugin changes:
sudo systemctl restart jenkins
For JCasC-managed deployments, reload configuration from the Jenkins UI/API after updating YAML.
Jenkinsfile