snice
SYNOPSIS
skill [signal to send] [options] process selection criteria
snice [new priority] [options] process selection criteria
DESCRIPTION
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. (snice +4 ...) Pri
ority numbers range from +20 (slowest) to -20 (fastest).
Negative priority numbers are restricted to administrative
users.
GENERAL OPTIONS
-f fast mode This is not currently useful.
-i interactive use You will be asked to approve each
action.
-v verbose output Display information about selected
processes.
-w warnings enabled This is not currently useful.
-n no action This only displays the process ID.
-V show version Displays version of program.
PROCESS SELECTION OPTIONS
Selection criteria can be: terminal, user, pid, command.
The options below may be used to ensure correct interpre
tation. Do not blame Albert for this interesting inter
face.
-t The next argument is a terminal (tty or pty).
-u The next argument is a username.
-p The next argument is a process ID number.
-c The next argument is a command name.
SIGNALS
The signals listed below may be available for use with
skill. When known, numbers and default behavior are
shown.
Name Num Action Description
() ()
0 0 n/a exit code indicates if a signal may be sent
ALRM 14 exit
HUP 1 exit
URG ignore
TSTP stop may interact with the shell
TTIN stop may interact with the shell
TTOU stop may interact with the shell
STOP stop this signal may not be blocked
CONT restart continue if stopped, otherwise ignore
ABRT 6 core
FPE 8 core
ILL 4 core
QUIT 3 core
SEGV 11 core
TRAP 5 core
SYS core may not be implemented
EMT core may not be implemented
BUS core core dump may fail
XCPU core core dump may fail
XFSZ core core dump may fail
EXAMPLES
Command Description
snice seti crack +7 Slow down seti and crack
skill -KILL -v /dev/pts/* Kill users on new-style PTY devices
skill -STOP viro lm davem Stop 3 users
snice -17 root bash Give priority to root's shell
SEE ALSO
killall(1) pkill(1) kill(1) renice(1) nice(1) signal(7)
kill(2)
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, and is
the current maintainer of the procps collection. Please
send bug reports to <procps-feedback@lists.sf.net>.
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