jenkins update using latest jenkins.war file

#to check the version of jenkins
sudo rpm -qa | grep jenkins
#create folder jenkins-war 
sudo mkdir /jenkins-war ; cd /jenkins-war
#copy file of jenkins war folder to take back up
sudo cp -p /usr/lib/jenkins/jenkins.war jenkins.war.orig
#dowload latest jenkins updated file 
sudo wget http://updates.jenkins-ci.org/download/war/(version)/jenkins.war
#to chake updated version of jenkins 
https://jenkins.io/changelog-stable/
#after download copy that file 
cp -pr jenkins.war /usr/lib/jenkins/jenkins.war
#to check log of jenkins 
tail -50 /var/log/jenkins/jenkins.log
#to see war log message
tail -50 /var/log/messages