nohup(1)                                                           nohup(1)

NAME
     nohup - run a command immune to hangups and quits

SYNOPSIS
     nohup command [argument ...]

DESCRIPTION
     nohup executes a command or shell script, ignoring the signals SIGHUP
     (signal number 1) and SIGQUIT (signal number 3). nohup can be used to
     prevent a process from being terminated when you log out from a termi-
     nal.

     Before the call

     If you wish to use nohup with a pipe or a list of commands, you must
     put the relevant pipeline or command list in a file and run the file
     as a shell script under nohup's management.

ARGUMENTS
     command [argument ...]
          Any command or shell script. You can pass arguments to command by
          entering them after the command as usual.

          If the standard output and standard error of command have not
          been redirected, they will be written to a file called nohup.out
          in the current directory.

          If you are not permitted to create the file nohup.out in the
          current directory (i.e. you have no write permission for this
          directory) or if you do not have write permission for the file
          nohup.out in the current directory, the output will be redirected
          to the file $HOME/nohup.out.

          If the file nohup.out or $HOME/nohup.out does not exist, a corre-
          sponding file is created which has exclusive permissions for the
          user executing the call; otherwise, the output is appended to the
          existing file.

EXIT STATUS
     126   The specified command exists, but cannot be executed.

     127   The specified command cannot be found or an error occurred for
           the nohup command.

     If command was called, nohup returns the exit status of the executed
     command command.









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nohup(1)                                                           nohup(1)

ERROR MESSAGE

     nohup: cannot open/create nohup.out

     You are not allowed to create a file called nohup.out in the current
     working directory or in $HOME, or you are not allowed to write to
     existing nohup.out files in those directories.

ENVIRONMENT VARIABLE
     HOME   The value of the environment variable HOME is used to determine
            the directory in which the file nohup.out is to be created in
            cases where nohup.out in the current directory is write-protec-
            ted or where you are not allowed to create files in the current
            directory.

LOCALE
     The LCMESSAGES environment variable governs the language in which
     message texts are displayed. If LCMESSAGES is undefined or is defined
     as the null string, it defaults to the value of LANG. If LANG is like-
     wise undefined or null, the system acts as if it were not internation-
     alized.

     The LCALL environment variable governs the entire locale. LCALL
     takes precedence over all the other environment variables which affect
     internationalization.

EXAMPLE
     You initiate the following job and set it to run in the background:

     $ nohup program &
     sending output to nohup.out

     You then log out. program is not terminated, since it is immune to the
     quit signal. The output is written to a file called nohup.out.

FILES
     nohup.out
          File located in the current directory which receives the standard
          output and standard error output from commands executed under
          nohup.

     $HOME/nohup.out
          The standard output and standard error output of commands exe-
          cuted under nohup are sent to this file if the nohup.out file in
          the current directory is write-protected or if you are not
          allowed to create this file in the current directory (because you
          do not have write permission there).

SEE ALSO
     chmod(1), kill(1), nice(1), sh(1), signal(2).




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