Nohup

The title of this article is incorrect because of technical limitations. The correct title is nohup.

nohup is a UNIX command that runs a command but suppresses the action of the HUP (hangup) signal, enabling the command to keep running after a user who issues the command has logged out. It is usually used to run commands in background as daemons. Output that would normally go to the terminal goes to a file nohup.out.

Example

$# Start fetchmail daemon and log out. Daemon will continue in background
$ nohup fetchmail -d 30 &
$ exit