Tutorials
Manually upgrade jenkins version
To manually upgrade jenkins, first you need to connect to the jenkins server and then become root:
Connect to server
ssh <user>@<jenkins_server>
Become root user
sudo su
Go to jenkins directory where the war file exists
cd /var/lib/jenkins
# or
cd /usr/share/jenkins
Archive current version of jenkins.war file
gzip jenkins.war
It will create jenkins.war.gz file and will delete jenkins.war file
Download latest version of jenkins.war file
wget http://updates.jenkins-ci.org/download/war/<version>/jenkins.war
Restart jenkins
/etc/init.d/jenkins restart
Now you need to wait a few seconds to restart jenkins and then you'll see the version was upgraded