skill [signal] [options] expression
snice [new priority] [options] expression
These tools are obsolete and unportable. The command syntax is poorly defined. Consider using the killall, pkill, and pgrep commands instead.
The default signal for skill is TERM. Use -l or -L to list available signals. Particularly useful signals include HUP, INT, KILL, STOP, CONT, and 0. Alternate signals may be specified in three ways: -9 -SIGKILL -KILL.
The default priority for snice is +4. Priority numbers range from +20 (slowest) to -20 (fastest). Negative priority numbers are restricted to administrative users.
- -f, --fast
Fast mode. This option has not been implemented.
- -i, --interactive
Interactive use. You will be asked to approve each action.
- -l, --list
List all signal names.
- -L, --table
List all signal names in a nice table.
- -n, --no-action
No action; perform a simulation of events that would occur but do not actually change the system.
- -v, --verbose
Verbose; explain what is being done.
- -w, --warnings
Enable warnings. This option has not been implemented.
- -h, --help
Display help text and exit.
- -V, --version
Display version information.
Process Selection Options
Selection criteria can be: terminal, user, pid, command. The options below may be used to ensure correct interpretation.
- -t, --tty tty
The next expression is a terminal (tty or pty).
- -u, --user user
The next expression is a username.
- -p, --pid pid
The next expression is a process ID number.
- -c, --command command
The next expression is a command name.
- --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: ipc, mnt, net, pid, user, uts.
The behavior of signals is explained in signal(7) manual page.
- snice -c seti -c crack +7
+Slow down seti and crack commands.
- skill -KILL -t /dev/pts/*
Kill users on PTY devices.
- skill -STOP -u viro -u lm -u davem
Stop three users.
kill(1), kill(2), killall(1), nice(1), pkill(1), renice(1), signal(7)
No standards apply.
Albert Cahalan wrote skill and snice in 1999 as a replacement for a non-free version.
Please send bug reports to email@example.com
The man page snice(1) is an alias of skill(1).