check jenkins version in linux code example

Example: how to check jenkins version in ubuntu

# Check <version> value in config file:
/var/lib/jenkins/config.xml
# or
head -5 /var/lib/jenkins/config.xml| grep -oP ‘(?<=).*?(?=)’
# or open the jenkins consol, see at bottom right:
Page generated: Nov 20, 2020 7:18:04 AMREST APIJenkins ver. 1.625.2