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UL(1) |
User Commands |
UL(1) |
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
- Overrides the terminal type specified in the environment with
TERM.
- -V, --version
- Display version information and exit.
- -h, --help
- Display a 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.
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