# phpman > man > nproc(1)

> **TLDR:** Print the number of processing units (normally CPUs) available.
>
- Display the number of available processing units:
  `nproc`
- Display the number of installed processing units, including any inactive ones:
  `nproc --all`
- If possible, subtract a given number of units from the returned value:
  `nproc --ignore {{count}}`

*Source: tldr-pages*

---

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## NAME
       nproc - print the number of processing units available

## SYNOPSIS
       **nproc** [_OPTION_]...

## DESCRIPTION
       Print the number of processing units available to the current process, which may be less than
       the number of online processors

       **--all**  print the number of installed processors

       **--ignore**=_N_
              if possible, exclude N processing units

       **--help** display this help and exit

### --version
              output version information and exit

## AUTHOR
       Written by Giuseppe Scrivano.

## REPORTING BUGS
       GNU coreutils online help: <<https://www.gnu.org/software/coreutils/>>
       Report any translation bugs to <<https://translationproject.org/team/>>

## COPYRIGHT
       Copyright © 2020 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
       Full documentation <<https://www.gnu.org/software/coreutils/nproc>>
       or available locally via: info '(coreutils) nproc invocation'



GNU coreutils 8.32                          January 2026                                    [NPROC(1)](https://www.chedong.com/phpMan.php/man/NPROC/1/markdown)