kill [ -s signal_name | -n signal_number | -sig ] [ -q value ] job ...
kill -l [ sig ... ]
kill -L
       Sends either SIGTERM or the specified signal to the  given  jobs
       or  processes.  Signals are given by number or by names, with or
       without the `SIG' prefix.  If  the  signal  being  sent  is  not
       `KILL'  or  `CONT', then the job will be sent a `CONT' signal if
       it is stopped.  The argument job can be the process ID of a  job
       not in the job list.  In the second form, kill -l, if sig is not
       specified  the signal names are listed.  Otherwise, for each sig
       that is a name, the corresponding signal number is listed.   For
       each  sig  that  is a signal number or a number representing the
       exit status of a process which was terminated or  stopped  by  a
       signal  the  name of the signal is printed.  The final form with
       -L lists each signal name with its corresponding number.

       On some systems, alternative signal names are allowed for a  few
       signals.  Typical examples are SIGCHLD and SIGCLD or SIGPOLL and
       SIGIO, assuming they correspond to the same signal number.  kill
       -l  will  only list the preferred form, however kill -l alt will
       show if the alternative form corresponds  to  a  signal  number.
       For example, under Linux kill -l IO and kill -l POLL both output
       29, hence kill -IO and kill -POLL have the same effect.

       Many  systems  will  allow  process IDs to be negative to kill a
       process group or zero to kill the current process group.

       The -q option allows an integer value to be sent with the signal
       on systems that support sigqueue().
