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+.\" Copyright (c) 1980, 1990, 1993
+.\"	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.
+.\"
+.\"     @(#)colcrt.1	8.1 (Berkeley) 6/30/93
+.\"
+.TH COLCRT "1" "September 2011" "util-linux" "User Commands"
+.SH NAME
+colcrt \- filter nroff output for CRT previewing
+.SH SYNOPSIS
+.B colcrt
+[options]
+.RI [ file ...]
+.SH DESCRIPTION
+.B colcrt
+provides virtual half-line and reverse line feed sequences for terminals
+without such capability, and on which overstriking is destructive.
+Half-line characters and underlining (changed to dashing `\-') are placed on
+new lines in between the normal output lines.
+.SH OPTIONS
+.TP
+\fB\-\fR, \fB\-\-no\-underlining\fR
+Suppress all underlining.  This option is especially useful for previewing
+.I allboxed
+tables from
+.BR tbl (1).
+.TP
+\fB\-2\fR, \fB\-\-half\-lines\fR
+Causes all half-lines to be printed, effectively double spacing the output.
+Normally, a minimal space output format is used which will suppress empty
+lines.  The program never suppresses two consecutive empty lines, however.
+The
+.B \-2
+option is useful for sending output to the line printer when the output
+contains superscripts and subscripts which would otherwise be invisible.
+.TP
+\fB\-V\fR, \fB\-\-version\fR
+Display version information and exit.
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+Display help text and exit.
+.SH HISTORY
+The
+.B colcrt
+command appeared in 3.0BSD.
+.SH BUGS
+Should fold underlines onto blanks even with the
+.B '\-'
+option so that a true underline character would show.
+.PP
+Can't back up more than 102 lines.
+.PP
+General overstriking is lost; as a special case '|' overstruck with '\-' or
+underline becomes '+'.
+.PP
+Lines are trimmed to 132 characters.
+.PP
+Some provision should be made for processing superscripts and subscripts in
+documents which are already double-spaced.
+.SH EXAMPLES
+A typical use of
+.B colcrt
+would be:
+.PP
+.RS
+.B tbl exum2.n \&| nroff \-ms \&| colcrt \- \&| more
+.RE
+.SH SEE ALSO
+.BR col (1),
+.BR more (1),
+.BR nroff (1),
+.BR troff (1),
+.BR ul (1)
+.SH AVAILABILITY
+The colcrt command is part of the util-linux package and is available from
+.UR https://\:www.kernel.org\:/pub\:/linux\:/utils\:/util-linux/
+Linux Kernel Archive
+.UE .