NPROC(1) User Commands NPROC(1)

nproc - print the number of processing units available

nproc [OPTION]...

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

Written by Giuseppe Scrivano.

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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.

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

February 2026 GNU coreutils 9.10