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Top Forums UNIX for Dummies Questions & Answers how to increase size of the console screen buffer ? Post 302115534 by cfajohnson on Wednesday 25th of April 2007 10:13:14 AM
Old 04-25-2007
Quote:
Originally Posted by the_learner
Its difficult to explain what I am exactly looking for, so let me try with an example..
Suppose my program prints out thousands lines. But once my program ends.. I am not able to scroll up and see all the 1000 lines. The size of the screen buffer is obviously limited. Is there anyway I can increase this size ?

Are you talking about a real or virtual console (e.g., such as you get on a Linux system with Ctrl-Alt-F1), or a terminal window (e.g., xterm or rxvt in X)?

If the latter, the terminal program probably has an option to set the buffer size; in xterm and rxvt, it's -sl NUM, where NUM is the number of lines you want to save. See your terminal's man page for more details.

In either a console or a terminal window, you can use typescript to save the session to a file, or you can use a pager such as [i/less[/i] or more to display the output of the command:

Code:
COMMAND | less

Or redirect the output of the command to a file:

Code:
COMMAND > FILE

Quote:
If there is a way, then is there any harm in increasing the size? Smilie

So long as you don't exceed available memory, no.

 

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FvwmConsole(1)							   Fvwm Modules 						    FvwmConsole(1)

NAME
FvwmConsole - an fvwm command input interface SYNOPSIS
Module FvwmConsole [options] FvwmConsole can only be invoked by fvwm. Command line invocation of the FvwmConsole module will not work. DESCRIPTION
FvwmConsole allows the user to type fvwm configuration commands interactively, and have them executed immediately. This tool is particu- larly useful for testing new configuration ideas, or for implementing temporary changes to your environment. INVOCATION
FvwmConsole must be spawned as a module by fvwm. FvwmConsole takes all xterm(1) options. FvwmConsole can be invoked by inserting the line 'Module FvwmConsole' in the .fvwm2rc file. This can be placed on a line by itself, if FvwmConsole is to be spawned during fvwm's initialization, or can be bound to a menu or mouse button or keystroke to invoke it later. CONFIGURATION OPTIONS
FvwmConsole uses xterm(1). All resources set for xterm are inherited unless overridden by command line options. Module FvwmConsole -g 40x10 -fg black -bg green3 A different terminal emulator can be specified with the -terminal option. However, only terminal programs that understand the options -name, -title and -e can be used. Module FvwmConsole -terminal rxvt Previous versions of FvwmConsole supported a -e option to choose a different front-end. Although this option is still provided for back- wards compatibility its use is discouraged unless you know exactly what you are doing. Module FvwmConsole -e FvwmConsoleC.pl (see FvwmConsoleC.pl(1)). Also X resources can be set in your ~/.Xdefaults file: FvwmConsole*VT100*geometry: 40x4 FvwmConsole*font: 7x14 COMMAND EDITING
There are a few options. If the GNU readline library is available, it can be used. If Perl5 is installed, FvwmConsoleC.pl can be used as a command editor. This can be accomplished by either copying FvwmConsoleC.pl to fvwmlib directory as FvwmConsoleC or invoking FvwmConsole with -e option. For example: Module FvwmConsole -e FvwmConsoleC.pl If neither one is installed, a simple input reading function which doesn't have editing capabilities is used. GNU readline and FvwmConsoleC.pl have some frequent used commands in common as default. These commands are similar to emacs. For more details, refer GNU readline man and info pages, and FvwmConsoleC.pl man page. Ctrl-A - beginning of line Ctrl-B - previous char Ctrl-D - delete char Ctrl-E - end of line Ctrl-F - next char Ctrl-H - backspace Ctrl-K - erase to the end of line Ctrl-N - next line Ctrl-P - previous line Ctrl-R - search reverse Ctrl-U - delete line Meta-B - previous word Meta-F - next word Esc < - beginning of history Esc > - end of history EXITING
FvwmConsole can be stopped by entering the EOF character (usually CTRL-D). Note! Do not use the "quit" command, as this is an fvwm builtin: typing "quit" at the FvwmConsole command line will cause fvwm to exit. COPYRIGHTS
Copyright 1996, Toshi Isogai. No guarantees or warranties are provided. Use this program at your own risk. Permission to use this program for any purpose is given, as long as the copyright is kept intact. SEE ALSO
xterm(1), FvwmConsoleC.pl(1), GNU Readline library AUTHOR
Toshi Isogai 3rd Berkeley Distribution 7 May 208 (2.5.26) FvwmConsole(1)
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