ul1
Do underlining
Usage
ul [options]
[file ...]
Overview
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 -
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
nroffoutput stream on a crt-terminal.
-
-t, -T, --terminal terminal -
Override the environment variable TERM with the specified terminal type.
-
-h, --help -
Display help text and exit.
-
-V, --version -
Display version and exit.
Environment
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(3)).
Releases
19 releases since Debian 1.1 (Buzz); the text changed 10 times.
--help since Debian 11 (Bullseye);
--indicated since Debian 11 (Bullseye);
--terminal since Debian 11 (Bullseye);
--version since Debian 11 (Bullseye);
-T since Debian 11 (Bullseye);
-V since Debian 11 (Bullseye);
-h since Debian 11 (Bullseye).