centos man page for ul

UL(1)								   User Commands							     UL(1)

NAME
       ul - do underlining

SYNOPSIS
       ul [options] [file ...]

DESCRIPTION
       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  appro-
       priate  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  under-
       line, 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 underlin-
	      ing 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.

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(1)).

SEE ALSO
       colcrt(1), login(1), man(1), nroff(1), setenv(1), terminfo(5)

BUGS
       Nroff usually outputs a series of backspaces and underlines intermixed with the text to indicate underlining.  No attempt is made to  opti-
       mize the backward motion.

HISTORY
       The ul command appeared in 3.0BSD.

AVAILABILITY
       The  ul	command  is  part of the util-linux package and is available from Linux Kernel Archive <ftp://ftp.kernel.org/pub/linux/utils/util-
       linux/>.

util-linux							  September 2011							     UL(1)