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 The

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, degenerates to cat(1) If the terminal cannot underline, underlining is ignored.

The following options are available:

• i 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 output stream on a crt-terminal.
• terminal Overrides the terminal type specified in the environment with

The following environment variable is used:

• TERM The variable is used to relate a tty device with its device capability description (see terminfo(5) is set at login time, either by the default terminal type specified in

or as set during the login process by the user in their

file (see setenv(1)

man(1) nroff(1) colcrt(1)

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 command appeared in x 3.0 .

The ul command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.