1 .\" Copyright (c) 1980, 1991, 1993
2 .\" The Regents of the University of California. All rights reserved.
4 .\" Redistribution and use in source and binary forms, with or without
5 .\" modification, are permitted provided that the following conditions
7 .\" 1. Redistributions of source code must retain the above copyright
8 .\" notice, this list of conditions and the following disclaimer.
9 .\" 2. Redistributions in binary form must reproduce the above copyright
10 .\" notice, this list of conditions and the following disclaimer in the
11 .\" documentation and/or other materials provided with the distribution.
12 .\" 3. All advertising materials mentioning features or use of this software
13 .\" must display the following acknowledgement:
14 .\" This product includes software developed by the University of
15 .\" California, Berkeley and its contributors.
16 .\" 4. Neither the name of the University nor the names of its contributors
17 .\" may be used to endorse or promote products derived from this software
18 .\" without specific prior written permission.
20 .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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26 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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32 .\" @(#)ul.1 8.1 (Berkeley) 6/6/93
34 .TH UL "1" "September 2011" "util-linux" "User Commands"
42 reads the named files (or standard input if none are given) and translates
43 occurrences of underscores to the sequence which indicates underlining for
44 the terminal in use, as specified by the environment variable
48 database is read to determine the appropriate sequences for underlining. If
49 the terminal is incapable of underlining but is capable of a standout mode,
50 then that is used instead. If the terminal can overstrike, or handles
51 underlining automatically,
55 If the terminal cannot underline, underlining is ignored.
58 \fB\-i\fR, \fB\-\-indicated\fR
59 Underlining is indicated by a separate line containing appropriate dashes
60 `\-'; this is useful when you want to look at the underlining which is
63 output stream on a crt-terminal.
65 \fB\-t\fR, \fB\-T\fR, \fB\-\-terminal\fR \fIterminal\fR
66 Override the environment variable
72 \fB\-V\fR, \fB\-\-version\fR
73 Display version information and exit.
75 \fB\-h\fR, \fB\-\-help\fR
76 Display help text and exit.
78 The following environment variable is used:
83 variable is used to relate a tty device with its device capability
87 is set at login time, either by the default terminal type specified in
89 or as set during the login process by the user in their
102 usually outputs a series of backspaces and underlines intermixed with the
103 text to indicate underlining. No attempt is made to optimize the backward
108 command appeared in 3.0BSD.
110 The ul command is part of the util-linux package and is available from
111 .UR https://\:www.kernel.org\:/pub\:/linux\:/utils\:/util-linux/