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javaubuntujenkinssystemctl

Jenkins not picking up config file changed (/etc/default/jenkins) in Ubuntu

Using:

  • Ubuntu 20.04.2 LTS
  • Java 1.8.0_322
  • Jenkins 2.332.1

I've been attempting to change the HTTP port or the User in /etc/default/jenkins file. However the changes are not picked up once I do:

sudo service jenkins restart

The answer here also doesn't seem to work: Jenkins changes in /etc/default/jenkins not working

sudo systemctl edit jenkins

just opens a new file for editing

Solution

  • Editing /etc/default/jenkins does not work after Jenkins version 2.332.1, which relies on systemd rather than the init system (documentation).

    Instead, run:

    systemctl edit jenkins

    which will bring up an editor with an empty file. Create the section below with the following:

    [Service]
Environment="JENKINS_PORT=8888"

    Change the port as desired and save the file (in case of nano as editor with Ctrl + X, Y). Finally, restart Jenkins and it should pick up the new port:

    sudo systemctl restart jenkins