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NOHUP(1) BSD General Commands Manual NOHUP(1)
nohup -- invoke a command immune to hangups
nohup utility [arg ...]
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.
The following variable is used by nohup.
HOME User's home directory.
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.
The nohup command is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.
BSD July 15, 2005 BSD
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