ul(1) — Linux manual page


UL(1)                         User Commands                        UL(1)

NAME         top

       ul - do underlining

SYNOPSIS         top

       ul [options] [file...]

DESCRIPTION         top

       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         top

       -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
              Override the environment variable TERM with the specified
              terminal type.

       -V, --version
              Display version information and exit.

       -h, --help
              Display help text and exit.

ENVIRONMENT         top

       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)).

HISTORY         top

       The ul command appeared in 3.0BSD.

BUGS         top

       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         top

       colcrt(1), login(1), man(1), nroff(1), setenv(3), terminfo(5)

AVAILABILITY         top

       The ul command is part of the util-linux package and is available
       from Linux Kernel Archive 

COLOPHON         top

       This page is part of the util-linux (a random collection of Linux
       utilities) project.  Information about the project can be found
       at ⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩.  If you
       have a bug report for this manual page, send it to
       util-linux@vger.kernel.org.  This page was obtained from the
       project's upstream Git repository
       ⟨git://git.kernel.org/pub/scm/utils/util-linux/util-linux.git⟩ on
       2021-03-21.  (At that time, the date of the most recent commit
       that was found in the repository was 2021-03-19.)  If you
       discover any rendering problems in this HTML version of the page,
       or you believe there is a better or more up-to-date source for
       the page, or you have corrections or improvements to the
       information in this COLOPHON (which is not part of the original
       manual page), send a mail to man-pages@man7.org

util-linux                   September 2011                        UL(1)

Pages that refer to this page: colcrt(1)grotty(1)