How to change port for jenkins window service when 8080 is being used

1. Go to the directory where you installed Jenkins (by default, it's under Program Files/Jenkins)
2. Open the Jenkins.xml configuration file
3. Search --httpPort=8080 and replace the 8080 with the new port number that you wish
4. Restart Jenkins for changes to take effect

Restart Jenkins service

Just restart the Jenkins service after you changed the port in jenkins.xml.

1. Press Win + R
2. Type "services.msc"

3. Right click on the "Jenkins" line > Restart

   

4. Type http://localhost:8081/ in your browser to test the change.

On Ubuntu 16.04 LTS you can change the Port like that:

1. Change port number in the config file /etc/default/jenkins to 8081 (or the port you like) HTTP_PORT=8081
2. Restart Jenkins: service jenkins restart

Start Jenkins from cmd line with this command :

java -jar jenkins.war --httpPort=8081