procps/skill.1

'\" t
.\" (The preceding line is a note to broken versions of man to tell
.\" them to pre-process this man page with tbl)
.\" Man page for skill and snice.
.\" Licensed under version 2 of the GNU General Public License.
.\" Written by Albert Cahalan, converted to a man page by
.\" Michael K. Johnson
.\"
.TH SKILL 1 "October 2011" "procps-ng" "User Commands"
.SH NAME
skill, snice \- send a signal or report process status
.SH SYNOPSIS
.B skill
.RI [ signal ]
.RI [ options ]
.I expression
.br
.B snice
.RI [ "new priority" ]
.RI [ options ]
.I expression
.SH DESCRIPTION
These tools are obsolete and unportable.  The command syntax is
poorly defined.  Consider using the killall, pkill, and pgrep
commands instead.
.PP
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.
.PP
The default priority for snice is +4.  Priority numbers range from
+20 (slowest) to \-20 (fastest).  Negative priority numbers are
restricted to administrative users.
.SH OPTIONS
.TP
.BR \-f , \ \-\-fast
Fast mode.  This option has not been implemented.
.TP
.BR \-i , \ \-\-interactive
Interactive use.  You will be asked to approve each action.
.TP
.BR \-l , \ \-\-list
List all signal names.
.TP
.BR \-L , \ \-\-table
List all signal names in a nice table.
.TP
.BR \-n , \ \-\-no\-action
No action; perform a simulation of events that would occur but do not
actually change the system.
.TP
.BR \-v , \ \-\-verbose
Verbose; explain what is being done.
.TP
.BR \-w , \ \-\-warnings
Enable warnings.  This option has not been implemented.
.TP
\fB\-h\fR, \fB\-\-help\fR
Display help text and exit.
.TP
\fB\-V\fR, \fB\-\-version\fR
Display version information.
.PD
.SH "PROCESS SELECTION OPTIONS"
Selection criteria can be: terminal, user, pid, command.  The options
below may be used to ensure correct interpretation.
.TP
\fB\-t\fR, \fB\-\-tty\fR \fItty\fR
The next expression is a terminal (tty or pty).
.TP
\fB\-u\fR, \fB\-\-user\fR \fIuser\fR
The next expression is a username.
.TP
\fB\-p\fR, \fB\-\-pid\fR \fIpid\fR
The next expression is a process ID number.
.TP
\fB\-c\fR, \fB\-\-command\fR \fIcommand\fR
The next expression is a command name.
.TP
\fB\-\-ns \fIpid\fR
Match the processes that belong to the same namespace as pid.
.TP
\fB\-\-nslist \fIns,...\fR
list which namespaces will be considered for the --ns option.
Available namespaces: ipc, mnt, net, pid, user, uts.
.PD
.SH SIGNALS
The behavior of signals is explained in
.BR signal (7)
manual page.
.SH EXAMPLES
.TP
.B snice -c seti -c crack +7
Slow down seti and crack commands.
.TP
.B skill \-KILL \-t /dev/pts/*
Kill users on PTY devices.
.TP
.B skill \-STOP \-u viro \-u lm \-u davem
Stop three users.
.SH "SEE ALSO"
.BR kill (1),
.BR kill (2),
.BR killall (1),
.BR nice (1),
.BR pkill (1),
.BR renice (1),
.BR signal (7)
.SH STANDARDS
No standards apply.
.SH AUTHOR
.UR albert@users.sf.net
Albert Cahalan
.UE
wrote skill and snice in 1999 as a replacement for a non-free
version.
.SH "REPORTING BUGS"
Please send bug reports to
.UR procps@freelists.org
.UE