pgrep got updated due to the confusion of the f,l and a flags.
While the newer behaviour is far better but it is no longer following
the ancient Solaris standards, so that got removed.
References: https://bugs.debian.org/752501
.\" Licensed under version 2 of the GNU General Public License.
.\" Copyright 2000 Kjetil Torgrim Homme
.\"
-.TH PGREP "1" "October 2012" "procps-ng" "User Commands"
+.TH PGREP "1" "March 2015" "procps-ng" "User Commands"
.SH NAME
pgrep, pkill \- look up or signal processes based on name and other attributes
.SH SYNOPSIS
.BR skill (1),
.BR kill (1),
.BR kill (2)
-.SH STANDARDS
-.B pkill
-and
-.B pgrep
-were introduced in Sun's Solaris 7. This implementation is fully compatible.
.SH AUTHOR
.UR kjetilho@ifi.uio.no
Kjetil Torgrim Homme