These tools are obsolete and unportable. The command syntax is
poorly defined. Consider using the killall, pkill, and pgrep
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
The default priority for snice is +4. Priority numbers range from
+20 (slowest) to -20 (fastest). Negative priority numbers are
restricted to administrative users.
Fast mode. This option has not been implemented.
Interactive use. You will be asked to approve each action.
List all signal names.
List all signal names in a nice table.
No action; perform a simulation of events that would occur but
do not actually change the system.
Verbose; explain what is being done.
Enable warnings. This option has not been implemented.
Display help text and exit.
Display version information.
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.
Match the processes that belong to the same namespace as pid.
list which namespaces will be considered for the --ns option.
Available namespaces: ipc, mnt, net, pid, user, uts.
This page is part of the procps-ng (/proc filesystem utilities)
project. Information about the project can be found at
⟨https://gitlab.com/procps-ng/procps⟩. If you have a bug report for
this manual page, see
This page was obtained from the project's upstream Git repository
⟨https://gitlab.com/procps-ng/procps.git⟩ on 2017-03-13. If you dis‐
cover any rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page, or
you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a mail
procps-ng October 2011 SKILL(1)