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

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

CodePudding user response：

sudo systemctl edit jenkins

Is what actually works,, as in the link in the question. It doesn't modify the config file, but anything that gets added here overwrites the config that can be viewed using:

systemctl cat jenkins

CodePudding user response：

Editing

/etc/default/jenkins

does not work anymore since 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. Paste the following contents: [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