Rdb: Ruby-Nachbau der MWC /rdb-Werkzeuge

man/clear.rdb.man

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+.TH clear.rdb "" "" "/rdb Command"
+.PC "Clear the terminal's screen"
+.B clear.rdb
+.PP
+.II "screen^clear"
+.II "clear screen"
+The command
+.B clear.rdb
+clears your terminal screen of all characters and leaves the
+cursor in the upper left corner.
+It is useful for menus and forms that look better on a clear
+screen.
+.PP
+.II termcap
+.II TERM
+.B clear.rdb
+uses the
+.B termcap
+file of terminal capabilities to find the string of special
+characters that are needed to clear your screen.
+To work correctly, the
+.B TERM
+environmental variable must be set correctly to the name of your
+terminal as listed in
+.BR /etc/termcap .
+.PP
+The COHERENT command
+.B clear.rdb
+also clears the screen.
+.PP
+The
+.B /rdb
+command
+.B termput
+can also clear the screen, as follows:
+.DM
+	termput cl
+.DE
+.\".PP
+.\"The difference is that
+.\".B termput
+.\"uses
+.\".BR /etc/termcap ,
+.\"whereas
+.\".B tput
+.\"use the
+.\".I terminfo
+.\"directory.
+.SH Speed
+.B clear.rdb
+is quite fast, but there is a much faster way.
+Set a shell variable
+.B CLEAR
+to the output of the command
+.B clear.rdb
+like this:
+.DM
+	export CLEAR=`clear`
+.DE
+.PP
+Then you can use:
+.DM
+	echo "$CLEAR"
+.DE
+.PP
+in your shell programs for a fast clear.
+Put it into your
+.B .profile
+so that it will always be available.
+Use quotation marks around the shell variables in case they
+have special characters in them.
+.SH "See Also"
+.B
+termput
+.R
+.br
+COHERENT Lexicon:
+.B
+clear,
+export,
+\&.profile,
+sh,
+TERM,
+termcap
+.R
+.SH Notes
+This command is named
+.B clear.rdb
+rather than
+.BR clear ,
+as in other implementations of
+.BR /rdb ,
+to avoid clashing with the COHERENT command
+.BR clear .
+.SO clear