2 .\" (The preceding line is a note to broken versions of man to tell
3 .\" them to pre-process this man page with tbl)
4 .\" Man page for skill and snice.
5 .\" Licensed under version 2 of the GNU General Public License.
6 .\" Written by Albert Cahalan, converted to a man page by
9 .TH SKILL 1 "March 12, 1999" "Linux" "Linux User's Manual"
11 skill, snice \- send a signal or report process status
15 skill [signal to send] [options] process selection criteria
16 snice [new priority] [options] process selection criteria
20 The default signal for skill is TERM. Use -l or -L to list available signals.
21 Particularly useful signals include HUP, INT, KILL, STOP, CONT, and 0.
22 Alternate signals may be specified in three ways: -9 -SIGKILL -KILL.
24 The default priority for snice is +4. (snice +4 ...)
25 Priority numbers range from +20 (slowest) to -20 (fastest).
26 Negative priority numbers are restricted to administrative users.
31 -f fast mode This is not currently useful.
33 You will be asked to approve each action.
36 Display information about selected processes.
38 -w warnings enabled This is not currently useful.
39 -n no action This only displays the process ID.
40 -V show version Displays version of program.
43 .SH "PROCESS SELECTION OPTIONS"
44 Selection criteria can be: terminal, user, pid, command.
45 The options below may be used to ensure correct interpretation.
46 Do not blame Albert for this interesting interface.
49 -t The next argument is a terminal (tty or pty).
50 -u The next argument is a username.
51 -p The next argument is a process ID number.
52 -c The next argument is a command name.
56 The signals listed below may be available for use with skill.
57 When known, numbers and default behavior are shown.
61 Name Num Action Description
63 0 0 n/a exit code indicates if a signal may be sent
67 KILL 9 exit this signal may not be blocked
75 STKFLT exit may not be implemented
76 PWR ignore may exit on some systems
80 TSTP stop may interact with the shell
81 TTIN stop may interact with the shell
82 TTOU stop may interact with the shell
83 STOP stop this signal may not be blocked
84 CONT restart continue if stopped, otherwise ignore
91 SYS core may not be implemented
92 EMT core may not be implemented
93 BUS core core dump may fail
94 XCPU core core dump may fail
95 XFSZ core core dump may fail
104 snice seti crack +7 Slow down seti and crack
105 skill -KILL -v /dev/pts/* Kill users on new-style PTY devices
106 skill -STOP viro lm davem Stop 3 users
107 snice -17 root bash Give priority to root's shell
111 killall(1) pkill(1) kill(1) renice(1) nice(1) signal(7) kill(2)
117 Albert Cahalan <albert@users.sf.net> wrote skill and snice in 1999 as a
118 replacement for a non-free version, and is the current maintainer of the
119 procps collection. Please send bug reports to <procps-feedback@lists.sf.net>.