NOHUP(1) DOMAIN/IX Reference Manual (SYS5) NOHUP(1)
NAME
nohup - run a command immune to hangups and quits
USAGE
nohup command [ arguments ]
DESCRIPTION
Nohup executes a specified command with hangups and quits
ignored. If you do not redirect output, both standard out-
put 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.
EXAMPLES
It is frequently desirable to apply nohup to pipelines or
lists of commands. This can be done only by placing pipe-
lines and command lists in a Shell procedure, and then issu-
ing the following:
nohup sh file
The nohup then 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.
See sh (1) for general information about the Shell.
Add an ampersand (&) and the contents of file are run in the
background with interrupts also ignored, as shown here:
nohup file &
The contents of file could be the following:
tbl ofile | eqn | nroff > nfile
CAUTIONS
If you specify nohup command1; command2, nohup applies only
to command1; nohup (command1; command2) is syntactically
incorrect.
Be careful of where standard error is redirected. The fol-
lowing command may put error messages on tape, making it
unreadable:
nohup cpio -o <list >/dev/rmt/1m&
On the other hand, this command puts the error messages into
the file errors:
nohup cpio -o <list >/dev/rmt/1m 2>errors&
Printed 6/10/85 NOHUP-1
NOHUP(1) DOMAIN/IX Reference Manual (SYS5) NOHUP(1)
RELATED INFORMATION
chmod (1), nice (1), sh (1), signal (2).
NOHUP-2 Printed 6/10/85