UL(1) BSD General Commands Manual UL(1)

ul – do underlining

ul [-i] [-t terminal] [name …]

Ul reads the named files (or standard input if none are given) and trans-
lates occurrences of underscores to the sequence which indicates under-
lining 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 ter-
minal can overstrike, or handles underlining automatically, ul degener-
ates to cat(1). If the terminal cannot underline, underlining is

The following options are available:

-i Underlining is indicated by a separate line containing appropri-
ate dashes `-‘; this is useful when you want to look at the
underlining which is present in an nroff output stream on a crt-

-t terminal
Overrides the terminal type specified in the environment with

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)).

man(1), nroff(1), colcrt(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 appeared in 3.0BSD. The ul command is part of the util-
linux-ng package and is available from ftp://ftp.ker-

4th Berkeley Distribution June 6, 1993 4th Berkeley Distribution

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