NOHUP(1) (User Environment Utilities) NOHUP(1)
NAME
nohup - run a command immune to hangups and quits
SYNOPSIS
nohup command [ arguments ]
DESCRIPTION
nohup executes command with hangups and quits ignored. If
output is not re-directed by the user, both standard output
and standard error are sent to nohup.out. If nohup.out is
not writable in the current directory, output is redirected
to $HOME/nohup.out.
EXAMPLE
It is frequently desirable to apply nohup to pipelines or
lists of commands. This can be done only by placing
pipelines and command lists in a single file, called a shell
procedure. One can then issue:
nohup sh file
and the nohup applies to everything in file. If the shell
procedure file is to be executed often, then the need to
type sh can be eliminated by giving file execute permission.
Add an ampersand and the contents of file are run in the
background with interrupts also ignored (see sh(1)):
nohup file &
An example of what the contents of file could be is:
sort ofile > nfile
SEE ALSO
chmod(1), nice(1), sh(1),
signal(2) in the Programmer's Reference Manual.
WARNINGS
In the case of the following command
Page 1 May 1989
NOHUP(1) (User Environment Utilities) NOHUP(1)
nohup command1; command2
nohup applies only to command1. The command
nohup (command1; command2)
is syntactically incorrect.
Page 2 May 1989