SKILL(1) User Commands SKILL(1)
NAME
skill, snice - send a signal or report process status
SYNOPSIS
skill [signal] [options] expression
snice [new priority] [options] expression
DESCRIPTION
These tools are obsolete and unportable. The command syntax is poorly
defined. Consider using the killall, pkill, and pgrep commands in-
stead.
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.
OPTIONS
-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.
SIGNALS
The behavior of signals is explained in signal(7) manual page.
EXAMPLES
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.
SEE ALSO
kill(1), kill(2), killall(1), nice(1), pkill(1), renice(1), signal(7)
STANDARDS
No standards apply.
AUTHOR
Albert Cahalan <albert@users.sf.net> wrote skill and snice in 1999 as a
replacement for a non-free version.
REPORTING BUGS
Please send bug reports to <procps@freelists.org>
procps-ng 2018-05-31 SKILL(1)