---
name: "nproc"
section: "1"
platform: "linux"
package: "coreutils"
version: "9.12-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux", "freebsd"]
url: "https://new.carta.tech/nproc"
---

# nproc(1)

print the number of processing units available

## 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. If the 'OMP\_NUM\_THREADS' or 'OMP\_THREAD\_LIMIT' environment variables are set, then they will determine the minimum and maximum returned value respectively.

- **--all**

  print the number of installed processors, disregarding any OpenMP environment variables, or CPU quotas.

- **--ignore=N**

  if possible, exclude N processing units. The result is guaranteed to be at least 1.

- **--help**

  display this help and exit

- **--version**

  output version information and exit

## AUTHOR

Written by Giuseppe Scrivano.

## REPORTING BUGS

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

## COPYRIGHT

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

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