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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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RESIZE(1)						      General Commands Manual							 RESIZE(1)

NAME
resize - set TERMCAP and terminal settings to current xterm window size SYNOPSIS
resize [ -u | -c ] [ -s [ row col ] ] DESCRIPTION
Resize prints a shell command for setting the TERM and TERMCAP environment variables to indicate the current size of xterm window from which the command is run. For this output to take effect, resize must either be evaluated as part of the command line (usually done with a shell alias or function) or else redirected to a file which can then be read in. From the C shell (usually known as /bin/csh), the follow- ing alias could be defined in the user's .cshrc: % alias rs 'set noglob; eval `resize`' After resizing the window, the user would type: % rs Users of versions of the Bourne shell (usually known as /bin/sh) that don't have command functions will need to send the output to a tempo- rary file and the read it back in with the ``.'' command: $ resize > /tmp/out $ . /tmp/out OPTIONS
The following options may be used with resize: -u This option indicates that Bourne shell commands should be generated even if the user's current shell isn't /bin/sh. -c This option indicates that C shell commands should be generated even if the user's current shell isn't /bin/csh. -s [rows columns] This option indicates that Sun console escape sequences will be used instead of the VT100-style xterm escape codes. If rows and columns are given, resize will ask the xterm to resize itself. However, the window manager may choose to disallow the change. Note that the Sun console escape sequences are recognized by XFree86 xterm and by dtterm. The resize program may be installed as sunsize, which causes makes it assume the -s option. The rows and columns arguments must appear last; though they are normally associated with the -s option, they are parsed sepa- rately. FILES
/etc/termcap for the base termcap entry to modify. ~/.cshrc user's alias for the command. SEE ALSO
csh(1), tset(1), xterm(1) AUTHORS
Mark Vandevoorde (MIT-Athena), Edward Moy (Berkeley) Copyright (c) 1984, 1985 by X Consortium See X(7x) for a complete copyright notice. XFree86 Version Version 4.3.0 RESIZE(1)
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