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nproc(1) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | AUTHOR | REPORTING BUGS | COPYRIGHT | SEE ALSO | COLOPHON 

NPROC(1)                      User Commands                      NPROC(1)

NAME         top

       nproc - print the number of processing units available

SYNOPSIS         top

       nproc [OPTION]...

DESCRIPTION         top

       Print the number of processing units available to the current
       process, which may be less than the number of online processors.
       If the 'OMP_NUM_THREADS' or 'OMP_THREAD_LIMIT' environment
       variables are set, then they will determine the minimum and
       maximum returned value respectively.

       ]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#nproc--all\--all]8;;\  print the number of installed processors, disregarding any
              OpenMP environment variables, or CPU quotas.

       ]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#nproc--ignore\--ignore=N]8;;\
              if possible, exclude N processing units.  The result is
              guaranteed to be at least 1.

       ]8;;https://www.gnu.org/software/coreutils/nproc#nproc--help\--help]8;;\ display this help and exit

       ]8;;https://www.gnu.org/software/coreutils/nproc#nproc--version\--version]8;;\
              output version information and exit

AUTHOR         top

       Written by Giuseppe Scrivano.

REPORTING BUGS         top

       Report bugs to: bug-coreutils@gnu.org
       GNU coreutils home page: <https://www.gnu.org/software/coreutils/>
       General help using GNU software: <https://www.gnu.org/gethelp/>
       Report any translation bugs to
       <https://translationproject.org/team/>

COPYRIGHT         top

       Copyright © 2026 Free Software Foundation, Inc.  License GPLv3+:
       GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.
       There is NO WARRANTY, to the extent permitted by law.

SEE ALSO         top

       Full documentation <https://www.gnu.org/software/coreutils/nproc>
       or available locally via: info '(coreutils) nproc invocation'

COLOPHON         top

       This page is part of the coreutils (basic file, shell and text
       manipulation utilities) project.  Information about the project
       can be found at ⟨http://www.gnu.org/software/coreutils/⟩.  If you
       have a bug report for this manual page, see
       ⟨http://www.gnu.org/software/coreutils/⟩.  This page was obtained
       from the tarball coreutils-9.11.tar.xz fetched from
       ⟨http://ftp.gnu.org/gnu/coreutils/⟩ on 2026-05-24.  If you
       discover any rendering problems in this HTML version of the page,
       or you believe there is a better or more up-to-date source for the
       page, or you have corrections or improvements to the information
       in this COLOPHON (which is not part of the original manual page),
       send a mail to man-pages@man7.org

GNU coreutils 9.11              April 2026                       NPROC(1)

Pages that refer to this page: sched_setaffinity(2),  get_nprocs(3)

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