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SKILL(1)                      Linux User's Manual                     SKILL(1)



NAME
       skill, snice - send a signal or report process status


SYNOPSIS
       skill [signal to send] [options] process selection criteria
       snice [new priority] [options] process selection criteria


DESCRIPTION
       These tools are probably obsolete and unportable. The command syntax is poorly defined. Consider using the kil-
       lall, pkill, and pgrep commands instead.

       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  ...)   Priority  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
       interpretation.  Do not blame Albert for this interesting interface.

       -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
       INT        2   exit
       KILL       9   exit      this signal may not be blocked
       PIPE      13   exit
       POLL           exit
       PROF           exit
       TERM      15   exit
       USR1           exit

       USR2           exit
       VTALRM         exit
       STKFLT         exit      may not be implemented
       PWR            ignore    may exit on some systems
       WINCH          ignore
       CHLD           ignore
       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 <albertATusers.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-feedbackATlists.net>.



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