snice from procps-ng 3.3.10

Usage: snice [new priority] [options] <expression> Options: -f, --fast fast mode (not implemented) -i, --interactive interactive -l, --list list all signal names -L, --table list all signal names in a nice table -n, --no-action do not actually kill processes; just print what would happen -v, --verbose explain what is being done -w, --warnings enable warnings (not implemented) Expression can be: terminal, user, pid, command. The options below may be used to ensure correct interpretation. -c, --command <command> expression is a command name -p, --pid <pid> expression is a process id number -t, --tty <tty> expression is a terminal -u, --user <username> expression is a username Alternatively, expression can be: --ns <pid> match the processes that belong to the same namespace as <pid> --nslist <ns,...> list which namespaces will be considered for the --ns option; available namespaces are : ipc, mnt, net, pid, user, uts -h, --help display this help and exit -V, --version output version information and exit The default priority is +4. (snice +4 ...) Priority numbers range from +20 (slowest) to -20 (fastest). Negative priority numbers are restricted to administrative users. For more details see snice(1).