stress(1) (NAME) stress - (SYNOPSIS) stress [OPTIONS] (DESCRIPTION) stress I/O POSIX . stress . (OPTIONS) -?, --help . --version . -v, --verbose ( ). -q, --quiet ( ). -n, --dry-run ( ). -t, --timeout N . -n . --backoff . -c, --cpu N sqrt() . -i, --io N sync() . -m, --vm N malloc()/free() . --vm-bytes B vm ( 256MB ). --vm-stride B ( 4096 ). --vm-hang N (free) ( 0 ). --vm-keep (redirty) . -d, --hdd N write()/unlink() . --hdd-bytes B hdd ( 1GB ). mkstemp() . : s m h d y () B K M G () . (EXAMPLES) (load average) . (fork) sqrt() rand() . stress -c 13 . . stress --quiet --cpu 1k / (I/O bound) -i . sync() (flush) . stress -i 4 (hog) . (verbosity) . stress -c 13 -i 4 --verbose --timeout 1m . mkstemp() . stress -d 1 --hdd-bytes 13 Large file support is enabled. stress -d 1 --hdd-bytes 3G (AUTHORS) stress Amos Waterland . : https://github.com/resurrecting-open-source-projects/stress stress-1.0.7 21 Jan 2023 stress(1)