FreeBSD 7.0 manual page repository

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nohup - invoke a utility immune to hangups



      nohup - invoke a utility immune to hangups


      nohup [--] utility [arguments]


      The nohup utility invokes utility with its arguments and at this time
      sets the signal SIGHUP to be ignored.  If the standard output is a termi‐
      nal, 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.
      Some shells may provide a builtin nohup command which is similar or iden‐
      tical to this utility.  Consult the builtin(1) manual page.


      The following variables are utilized by nohup:
      HOME  If the output file nohup.out cannot be created in the current
            directory, the nohup utility uses the directory named by HOME to
            create the file.
      PATH  Used to locate the requested utility if the name contains no ‘/’
      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.
      builtin(1), csh(1), signal(3)


      The nohup utility is expected to be IEEE Std 1003.2 (“POSIX.2”) compati‐


      Two or more instances of nohup can append to the same file, which makes
      for a confusing output.


Based on BSD UNIX
FreeBSD is an advanced operating system for x86 compatible (including Pentium and Athlon), amd64 compatible (including Opteron, Athlon64, and EM64T), UltraSPARC, IA-64, PC-98 and ARM architectures. It is derived from BSD, the version of UNIX developed at the University of California, Berkeley. It is developed and maintained by a large team of individuals. Additional platforms are in various stages of development.