invoke a command immune to
||utility [arg ...]|
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
(“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,
exit without invoking utility, with an exit value as
- User's home directory.
nohup utility exits with one of the
- The utility was found but could not be invoked.
- The utility could not be found or an error occurred
Otherwise, the exit status of
be that of utility.
nohup utility is compliant with the
IEEE Std 1003.1-2008 (“POSIX.1”)
nohup also exists as a built-in to
with a different syntax.