Navigate to localhost:8080 address for Jenkins.

Click Freestyle Project "This is the central feature of Jenkins. Jenkins will build your project, combining any SCM with any build system, and this can be even used for ..."

This is the central feature of Jenkins. Jenkins will build your project, combining any SCM with any build system, and this can be even used for something other than software build.

Type "echo "Starting execution" [[enter]] cat /etc/os-release >> os.txt"