4.2BSD/usr/man/man1/kill.1

.TH KILL 1 "18 January 1983"
.UC 4
.SH NAME
kill \- terminate a process with extreme prejudice
.SH SYNOPSIS
.B kill
[
.BR \- sig
]
processid ...
.br
.B kill
.B \-l
.SH DESCRIPTION
.I Kill
sends the TERM (terminate, 15) signal to the specified processes.
If a signal name or number preceded by `\-' is given
as first argument, that signal is sent instead of
terminate
(see
.IR  sigvec (2)).
The signal names are listed by
`kill \-l', and are as given in
.I /usr/include/signal.h,
stripped of the common SIG prefix.
.PP
The terminate signal will kill processes that do not catch the signal;
`kill \-9 ...' is a sure kill, as the KILL (9) signal cannot be caught.
By convention, if process number 0 is specified, all members
in the process group (i.e. processes resulting from 
the current login) are signaled (but beware: this works only
if you use
.IR sh (1);
not if you use
.IR csh (1).)
The killed processes must belong
to the current user unless
he is the super-user.
.PP
The process number of an asynchronous process
started with `&' is reported by the shell.
Process numbers can also be found by using
.I Kill
is a built-in to
.IR csh (1);
it allows job specifiers ``%...''
so process id's are not as often used as
.I kill
arguments.
See
.IR csh (1)
for details.
.SH "SEE ALSO"
csh(1), ps(1), kill(2), sigvec(2)
.SH BUGS
An option to kill process groups ala
.IR killpg (2)
should be provided; a replacement for ``kill 0''
for
.IR csh (1)
users should be provided.