Provided by: psmisc_22.15-2ubuntu1_amd64 bug


       killall - kill processes by name


       killall [-Z,--context pattern] [-e,--exact] [-g,--process-group] [-i,--interactive]
       [-o,--older-than TIME] [-q,--quiet] [-r,--regexp] [-s,--signal signal] [-u,--user user]
       [-v,--verbose] [-w,--wait] [-y,--younger-than TIME] [-I,--ignore-case] [-V,--version] [--]
       name ...
       killall -l
       killall -V,--version


       killall sends a signal to all processes running any  of  the  specified  commands.  If  no
       signal name is specified, SIGTERM is sent.

       Signals  can be specified either by name (e.g. -HUP or -SIGHUP ) or by number (e.g. -1) or
       by option -s.

       If the command name is not regular expression  (option  -r)  and  contains  a  slash  (/),
       processes  executing  that  particular  file  will be selected for killing, independent of
       their name.

       killall returns a zero return code if at least one process has been killed for each listed
       command,  or no commands were listed and at least one process matched the -u and -Z search
       criteria. killall returns non-zero otherwise.

       A killall process never kills itself (but may kill other killall processes).


       -e, --exact
              Require an exact match for very long names. If a command name  is  longer  than  15
              characters,  the  full  name  may  be unavailable (i.e. it is swapped out). In this
              case, killall will kill everything that matches within  the  first  15  characters.
              With -e, such entries are skipped.  killall prints a message for each skipped entry
              if -v is specified in addition to -e,

       -I, --ignore-case
              Do case insensitive process name match.

       -g, --process-group
              Kill the process group to which the process belongs. The kill signal is  only  sent
              once per group, even if multiple processes belonging to the same process group were

       -i, --interactive
              Interactively ask for confirmation before killing.

       -l, --list
              List all known signal names.

       -o, --older-than
              Match only processes that are older (started before) the time specified.  The  time
              is  specified  as  a  float  then  a unit. The units are s,m,h,d,w,M,y for seconds,
              minutes, hours, days, weeks, Months and years respectively.

       -q, --quiet
              Do not complain if no processes were killed.

       -r, --regexp
              Interpret process name pattern as an extended regular expression.

       -s, --signal
              Send this signal instead of SIGTERM.

       -u, --user
              Kill only processes the specified user owns. Command names are optional.

       -v, --verbose
              Report if the signal was successfully sent.

       -V, --version
              Display version information.

       -w, --wait
              Wait for all killed processes to die. killall checks once per second if any of  the
              killed  processes still exist and only returns if none are left.  Note that killall
              may wait forever if the signal was ignored, had no effect, or if the process  stays
              in zombie state.

       -y, --younger-than
              Match only processes that are younger (started after) the time specified.  The time
              is specified as a float then a unit.  The  units  are  s,m,h,d,w,M,y  for  seconds,
              minutes, hours, days, weeks, Months and years respectively.

       -Z, --context
              (SELinux  Only)  Specify  security  context:  kill  only  processes having security
              context that match with given expended regular  expression  pattern.  Must  precede
              other arguments on the command line. Command names are optional.


       /proc     location of the proc file system


       Killing  by  file  only  works  for  executables that are kept open during execution, i.e.
       impure executables can't be killed this way.

       Be warned that typing killall name may not have the desired effect on  non-Linux  systems,
       especially when done by a privileged user.

       killall  -w  doesn't  detect if a process disappears and is replaced by a new process with
       the same PID between scans.

       If processes change their name, killall may not be able to match them correctly.


       Werner Almesberger <> wrote the original version  of  psmisc.  Since
       version 20 Craig Small <> can be blamed.


       kill(1), fuser(1), pgrep(1), pidof(1), pkill(1), ps(1), kill(2).