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nohup: Run a command immune to hangups
nohup runs the given command with hangup signals ignored,
so that the command can continue running in the background after you log
nohup command [arg]...
If standard output is a terminal, it is redirected so that it is appended to the file `nohup.out'; if that cannot be written to, it is appended to the file `$HOME/nohup.out'. If that cannot be written to, the command is not run.
nohup creates either `nohup.out' or
`$HOME/nohup.out', it creates it with no "group" or "other"
access permissions. It does not change the permissions if the output
file already existed.
If standard error is a terminal, it is redirected to the same file descriptor as the standard output.
nohup does not automatically put the command it runs in the
background; you must do that explicitly, by ending the command line
with an `&'. Also,
nohup does not change the
scheduling priority of command; use
nice for that,
e.g., `nohup nice command'.
The only options are `--help' and `--version'. See section 2. Common options.
126 if command was found but could not be invoked 127 if