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UL(1)                       General Commands Manual                      UL(1)

     ul - do underlining

     ul [-i] [-t terminal] [name ...]

     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 file /usr/share/misc/terminfo 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.

     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 nroff(1) output stream on
             a crt-terminal.

     -t terminal
             Overrides the terminal type specified in the environment with

     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 for example csh(1)'s setenv).

     /usr/share/misc/terminfo  File containing terminal descriptions.

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

     The ul command appeared in 3.0BSD.

     nroff(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.

NetBSD 10.99                     June 23, 2016                    NetBSD 10.99