Section (1) ul
ul — do underlining
ul [options] [ file...
ul reads the
named files (or standard input if none are given) and
translates occurrences of underscores to the sequence which
indicates underlining for the terminal in use, as specified
by the environment variable
TERM. The terminfo database is read
to determine the appropriate sequences for underlining. If
the terminal is incapable of underlining but is capable of a
standout mode, then that is used instead. If the terminal can
overstrike, or handles underlining automatically,
to cat(1). If the terminal
cannot underline, underlining is ignored.
Underlining is indicated by a separate line containing appropriate dashes `−_zsingle_quotesz_; this is useful when you want to look at the underlining which is present in an nroff output stream on a crt-terminal.
Override the environment variable
TERMwith the specified terminal type.
Display version information and exit.
Display help text and exit.
The following environment variable is used:
TERMvariable is used to relate a tty device with its device capability description (see terminfo(5)).
TERMis set at login time, either by the default terminal type specified in
/etc/ttysor as set during the login process by the user in their login file (see setenv(1)).
nroff usually outputs a series of backspaces and underlines intermixed with the text to indicate underlining. No attempt is made to optimize the backward motion.
The ul command is part of the util-linux package and is available from Linux Kernel Archive
Copyright (c) 1980, 1991, 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
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2. Redistributions in binary form must reproduce the above copyright
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3. All advertising materials mentioning features or use of this software
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This product includes software developed by the University of
California, Berkeley and its contributors.
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may be used to endorse or promote products derived from this software
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THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS_zsingle_quotesz__zsingle_quotesz_ AND
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(#)ul.1 8.1 (Berkeley) 6/6/93