File: coreutils.info, Node: nproc invocation, Next: uname invocation, Prev: arch invocation, Up: System context 21.3 `nproc': Print the number of available processors ====================================================== Print the number of processing units available to the current process, which may be less than the number of online processors. If this information is not accessible, then print the number of processors installed. If the `OMP_NUM_THREADS' environment variable is set, then it will determine the returned value. The result is guaranteed to be greater than zero. Synopsis: nproc [OPTION] The program accepts the following options. Also see *note Common options::. `--all' Print the number of installed processors on the system, which may be greater than the number online or available to the current process. The `OMP_NUM_THREADS' environment variable is not honored in this case. `--ignore=NUMBER' If possible, exclude this NUMBER of processing units. An exit status of zero indicates success, and a nonzero value indicates failure.