NAME
ul - do underlining
SYNOPSIS
ul [options] [file...]
DESCRIPTION
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.
OPTIONS
-i, --indicated
-t, -T, --terminalterminal
-h, --help
-V, --version
ENVIRONMENT
The following environment variable is used:
TERM
HISTORY
The ul command appeared in 3.0BSD.
BUGS
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.
SEE ALSO
colcrt(1), login(1), man(1), nroff(1), setenv(3), terminfo(5)
REPORTING BUGS
For bug reports, use the issue tracker <https://github.com/util-linux/util-linux/issues>.
AVAILABILITY
The ul command is part of the util-linux package which can be downloaded from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils/util-linux/>.