nohup is the Command that normally users tend to use the command when the user wants to run some of the commands or jobs in the background. The difference is, if we are not using the Nohup command the session will ends, if the user log out the session. in other words the jobs or programs whichever runs in background without nohup will have the life time until the user log outs the session.

How to invoke the commands with nohup ?
nohup program_name &