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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | ENVIRONMENT | SEE ALSO | BUGS | HISTORY | AVAILABILITY | COLOPHON |
UL(1) User Commands UL(1)
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, ul degenerates to cat(1). If the terminal cannot
underline, underlining is ignored.
-i, --indicated
Underlining is indicated by a separate line containing
appropriate dashes `-'; this is useful when you want to look
at the underlining which is present in an nroff output stream
on a crt-terminal.
-t, -T, --terminal terminal
Override the environment variable TERM with the specified
terminal type.
-V, --version
Display version information and exit.
-h, --help
Display help text and exit.
The following environment variable is used:
TERM The TERM variable is used to relate a tty device with its
device capability description (see terminfo(5)). TERM is set
at login time, either by the default terminal type specified
in /etc/ttys or as set during the login process by the user in
their login file (see setenv(1)).
colcrt(1), login(1), man(1), nroff(1), setenv(1), terminfo(5)
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 appeared in 3.0BSD.
The ul command is part of the util-linux package and is available
from Linux Kernel Archive
⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩.
This page is part of the util-linux (a random collection of Linux
utilities) project. Information about the project can be found at
⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩. If you have a
bug report for this manual page, send it to
util-linux@vger.kernel.org. This page was obtained from the
project's upstream Git repository
⟨git://git.kernel.org/pub/scm/utils/util-linux/util-linux.git⟩ on
2017-07-05. If you discover any rendering problems in this HTML ver‐
sion of the page, or you believe there is a better or more up-to-date
source for the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original man‐
ual page), send a mail to man-pages@man7.org
util-linux September 2011 UL(1)
Pages that refer to this page: colcrt(1), grotty(1)