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- * @Id: clear.1,v 1.23 2020/02/02 23:34:34 tom Exp @
+ * @Id: clear.1,v 1.27 2022/02/12 20:07:29 tom Exp @
* these would be fallbacks for DS/DE,
* but groff changed the meaning of the macros.
-->
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<H1 class="no-header">clear 1</H1>
</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
- <STRONG>clear</STRONG> clears your screen if this is possible, including its scrollback
- buffer (if the extended "E3" capability is defined). <STRONG>clear</STRONG> looks in
- the environment for the terminal type given by the environment variable
- <STRONG>TERM</STRONG>, and then in the <STRONG>terminfo</STRONG> database to determine how to clear the
- screen.
+ <STRONG>clear</STRONG> clears your terminal's screen if this is possible, including the
+ terminal's scrollback buffer (if the extended "E3" capability is
+ defined). <STRONG>clear</STRONG> looks in the environment for the terminal type given
+ by the environment variable <STRONG>TERM</STRONG>, and then in the <STRONG>terminfo</STRONG> database to
+ determine how to clear the screen.
<STRONG>clear</STRONG> writes to the standard output. You can redirect the standard
output to a file (which prevents <STRONG>clear</STRONG> from actually clearing the
The <STRONG>E3</STRONG> extension came later:
- <STRONG>o</STRONG> In June 1999, xterm provided an extension to the standard control
+ <STRONG>o</STRONG> In June 1999, <STRONG>xterm</STRONG> provided an extension to the standard control
sequence for clearing the screen. Rather than clearing just the
visible part of the screen using
printf '\033[<STRONG>3</STRONG>J'
This is documented in <EM>XTerm</EM> <EM>Control</EM> <EM>Sequences</EM> as a feature
- originating with xterm.
+ originating with <STRONG>xterm</STRONG>.
<STRONG>o</STRONG> A few other terminal developers adopted the feature, e.g., PuTTY in
2006.
<STRONG>o</STRONG> In April 2011, a Red Hat developer submitted a patch to the Linux
kernel, modifying its console driver to do the same thing. The
- Linux change, part of the 3.0 release, did not mention xterm,
+ Linux change, part of the 3.0 release, did not mention <STRONG>xterm</STRONG>,
although it was cited in the Red Hat bug report (#683733) which led
to the change.
</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
- <STRONG><A HREF="tput.1.html">tput(1)</A></STRONG>, <STRONG><A HREF="terminfo.5.html">terminfo(5)</A></STRONG>
+ <STRONG><A HREF="tput.1.html">tput(1)</A></STRONG>, <STRONG><A HREF="terminfo.5.html">terminfo(5)</A></STRONG>, <STRONG>xterm(1)</STRONG>.
- This describes <STRONG>ncurses</STRONG> version 6.2 (patch 20210109).
+ This describes <STRONG>ncurses</STRONG> version 6.3 (patch 20220724).
projects / ncurses.git / blobdiff