NAME
nohup —
invoke a command immune to
hangups
SYNOPSIS
nohup |
utility [arg ...] |
DESCRIPTION
The nohup command allows the specified
utility to be protected from termination if the user should become logged
out (for example, due to a modem line or TCP/IP connection being dropped).
To do this, nohup sets the
SIGHUP
signal(3) (“terminal line hangup”) to be ignored, then
executes utility along with any arguments.
If the standard output is a terminal, the standard output is appended to the file nohup.out in the current directory. If standard error is a terminal, it is directed to the same place as the standard output.
If the output file nohup.out cannot be
created in the current directory, nohup attempts to
create the file in the user's home directory. If the file
nohup.out cannot be created, either in the current
directory or the user's home directory, nohup will
exit without invoking utility, with an exit value as
described below.
ENVIRONMENT
HOME- User's home directory.
EXIT STATUS
The nohup utility exits with one of the
following values:
- 126
- The utility was found but could not be invoked.
- 127
- The utility could not be found or an error occurred
in
nohup.
Otherwise, the exit status of nohup shall
be that of utility.
SEE ALSO
STANDARDS
The nohup utility is compliant with the
IEEE Std 1003.1-2008 (“POSIX.1”)
specification.
nohup also exists as a built-in to
csh(1), though with a different syntax.