22.4 nohup: Run a command immune to hangups

nohup runs the given command with hangup signals ignored, so that the command can continue running in the background after you log out. Synopsis:

nohup command [arg]...

If standard output is a terminal, it is redirected so that it is appended to the file `nohup.out'; if that cannot be written to, it is appended to the file `$HOME/nohup.out'. If that cannot be written to, the command is not run.

If nohup creates either `nohup.out' or `$HOME/nohup.out', it creates it with no "group" or "other" access permissions. It does not change the permissions if the output file already existed.

If standard error is a terminal, it is redirected to the same file descriptor as the standard output.

nohup does not automatically put the command it runs in the background; you must do that explicitly, by ending the command line with an `&'. Also, nohup does not change the scheduling priority of command; use nice for that, e.g., `nohup nice command'.

The only options are `--help' and `--version'. See section 2. Common options.

Exit status:

126 if command was found but could not be invoked 127 if nohup itself failed or if command could not be found the exit status of command otherwise