nohup-makes commands immune to hangups and quits

nohup ”makes commands immune to hangups and quits

 /usr/bin/nohup command [ arguments ] 

There are three distinct versions of nohup . nohup is built into the C shell and is an executable program available in /usr/bin/nohup when using the Bourne shell. The Bourne shell version of nohup executes commands such that they are immune to HUP (hangup) and TERM (terminate) signals. If the standard output is a terminal, it is redirected to the file nohup.out . The standard error is redirected to follow the standard output. The priority is incremented by five. nohup should be invoked from the shell with & in order to prevent it from responding to interrupts or input from the next user .

Example A.39.

 nohup lookup & 

EXPLANATION

The lookup program will run in the background and continue to run until it has completed, even if the user logs off. Any output generated goes to a file in the current directory called nohup.out .