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+.\" Copyright (c) 1983, 1991 The Regents of the University of California.
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)vipw.8	6.7 (Berkeley) 3/16/91
+.\"
+.TH VIPW "8" "September 2011" "util-linux" "System Administration"
+.SH NAME
+vipw, vigr \- edit the password or group file
+.SH SYNOPSIS
+.B vipw
+[options]
+.br
+.B vigr
+[options]
+.SH DESCRIPTION
+.B vipw
+edits the password file after setting the appropriate locks,
+and does any necessary processing after the password file is unlocked.
+If the password file is already locked for editing by another user,
+.B vipw
+will ask you
+to try again later.  The default editor for
+.B vipw
+and
+.B vigr
+is
+.BR vi (1).
+.B vigr
+edits the group file in the same manner as
+.B vipw
+does the passwd file.
+.SH ENVIRONMENT
+If the following environment variable exists, it will be utilized by
+.B vipw
+and
+.BR vigr :
+.I
+.TP
+.B EDITOR
+The editor specified by the string
+.B EDITOR
+will be invoked instead of the default editor
+.BR vi (1).
+.SH SEE ALSO
+.BR vi (1),
+.BR passwd (1),
+.BR flock (2),
+.BR passwd (5)
+.SH HISTORY
+The
+.B vipw
+command appeared in 4.0BSD.
+.br
+The
+.B vigr
+command appeared in Util-Linux 2.6.
+.SH AVAILABILITY
+The vigr and vipw commands are part of the util-linux package and are available from
+.UR https://\:www.kernel.org\:/pub\:/linux\:/utils\:/util-linux/
+Linux Kernel Archive
+.UE .