Ubuntu Manpages

nproc

Print the number of cores available to the current process. If the OMP_NUM_THREADS or OMP_THREAD_LIMIT environment variables are set, then they will determine the minimum and maximum returned value …

nproc [--all] [--ignore] [-h|--help] [-V|--version]

Print the number of cores available to the current process. If the OMP_NUM_THREADS or OMP_THREAD_LIMIT environment variables are set, then they will determine the minimum and maximum returned value respectively.

print the number of cores available to the system
ignore up to N cores
Print help
Print version

v(uutils coreutils) 0.2.2