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
The following variable is used by
nohup:
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 will
be that of utility.
SEE ALSO
STANDARDS
The nohup command is expected to be
IEEE Std 1003.2 (“POSIX.2”)
compatible.