skill

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



,

NAME
       skill, snice - report process status


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 ...)  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.


PROCESS SELECTION OPTIONS
       Selection criteria can be: terminal, user, pid, command.   The  options
       below may be used to ensure correct interpretation.

       -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 are available for use with skill.  When known,
       numbers and default behavior are shown.

       Name     Num   Action    Description
       ()                                                                          ()



       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      i386, m68k, arm and ppc hardware only
       UNUSED         exit      i386, m68k, arm and ppc hardware only
       TSTP           stop      context-dependent behavior may appear random
       TTIN           stop      context-dependent behavior may appear random
       TTOU           stop      context-dependent behavior may appear random
       STOP           stop      this signal may not be blocked
       CONT           restart   continue if stopped, otherwise ignore
       PWR            ignore    may exit on some systems
       WINCH          ignore
       CHLD           ignore
       URG            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 netscape crack +7            Slow down netscape and crack
       skill -KILL -v pts/*               Kill users on new-style PTY devices
       skill -STOP torvalds davem tytso   Stop 3 users
       snice -17 root bash                Give priority to root's shell


SEE ALSO
       top(1) kill(1) renice(1) nice(1)


STANDARDS
       No standards apply.


AUTHOR
       Albert Cahalan <acahalan@cs.uml.edu> wrote skill and snice in 1999 as a
       replacement  for  a non-free version. Michael K. Johnson <johnsonm@red-
       hat.com> is the current maintainer of the procps collection.

       Please send bug reports to <procps-list@redhat.com>



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