killall - kill all active processes
is a procedure used by to kill all active processes not directly related to the shutdown procedure.
is chiefly used to terminate all processes with open files so that the mounted file systems are no longer busy and can be unmounted. sends
the specified signal to all user processes in the system, with the following exceptions:
all processes (including background processes) associated with the terminal from which was invoked;
any process, if owned by
any process, if owned by
obtains its process information from and therefore may not be able to perfectly identify which processes to signal (see ps(1)).
If no signal is specified, a default of (kill) is used.
is invoked automatically by The use of is recommended over using by itself (see shutdown(1M)).
FILES SEE ALSO fuser(1M), kill(1), ps(1), shutdown(1M), signal(5).
STANDARDS CONFORMANCE killall(1M)
Check Out this Related Man Page
KILLALL(1) User Commands KILLALL(1)NAME
killall - kill processes by name
killall [-e,--exact] [-g,--process-group] [-i,--interactive] [-q,--quiet] [-v,--verbose] [-w,--wait] [-V,--version] [-S,--sid] [-c,--con-
text] [-s,--signal signal] [--] name ...
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 by number (e.g. -1).
If the command name 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 ilisted command. killall returns zero otherwise.
A killall process never kills itself (but may kill other killall processes).
OPTIONS -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,
Kill the process group to which the process belongs. The kill signal is only sent once per group, even if multiple processes belong-
ing to the same process group were found.
Interactively ask for confirmation before killing.
List all known signal names.
Do not complain if no processes were killed.
Report if the signal was successfully sent.
Display version information.
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
-S (Flask only) Specify SID: kill only processes with given SID. Mutually exclusive with -c argument. Must precede other arguments on
-c (Flask only) Specify security context: kill only processes with given security context. Mutually exclusive with -s. Must precede
other arguments on the command line.
/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.
Werner Almesberger <Werner.Almesberger@epfl.ch> wrote the original version of psmisc. Since version 20 Craig Small <email@example.com-
bear.id.au> can be blamed.
SEE ALSO kill(1), fuser(1), pgrep(1), pidof(1), ps(1), kill(2)Linux March 25, 2001 KILLALL(1)