RESIZECONS(8) System Manager's Manual RESIZECONS(8)
resizecons - change kernel idea of the console size
resizecons COLSxROWS resizecons -lines ROWS
The resizecons command tries to change the videomode of the console. There are several aspects to this: (a) the kernel must know about it, (b) the hardware must know about it, (c) user programs must know about it, (d) the console font may have to be adapted. (a) The kernel is told about the change using the ioctl VT_RESIZE. This causes the kernel to reallocate console screen memory for all virtual consoles, and might fail if there is not enough memory. (In that case, try to disallocate some virtual consoles first.) If this ioctl succeeds, but a later step fails (e.g., because you do not have root permissions), you may be left with a very messy screen. The most difficult part of this is (b), since it requires detailed knowledge of the video card hardware, and the setting of numerous registers. Only changing the number of rows is slightly easier, and resizecons will try to do that itself, when given the -lines option. (Probably, root permission will be required.) The command resizecons COLSxROWS will execute restoretextmode -r COLSxROWS (and hence requires that you have svgalib installed). Here COLSxROWS is a file that was created earlier by restoretextmode -w COLSxROWS. Again, either root permissions are required, or restoretextmode has to be suid root. In order to deal with (c), resizecons does a `stty rows ROWS cols COLS' for each active console (in the range tty0..tty15), and sends a SIGWINCH signal to selection if it finds the file /tmp/selection.pid. Finally, (d) is dealt with by executing a setfont command. Most likely, the wrong font is loaded, and you may want to do another setfont yourself afterwards.
resizecons does not work on all hardware. This command used to be called resize, but was renamed to avoid conflict with another command with the same name.
setfont(8), stty(1), selection(1), restoretextmode(8), disalloc(8)
This page is part of the kbd (Linux keyboard tools) project. Information about the project can be found at ⟨http://www.kbd-project.org/⟩. If you have a bug report for this man‐ ual page, send it to email@example.com. This page was obtained from the project's upstream Git repository ⟨https://github.com/legionus/kbd.git⟩ on 2020-07-14. (At that time, the date of the most recent commit that was found in the repository was 2020-07-10.) If you discover any rendering problems in this HTML version of the page, or you believe there is a better or more up-to- date source for the page, or you have corrections or improvements to the information in this COLOPHON (which is not part of the original manual page), send a mail to firstname.lastname@example.org kbd 17 Jan 1995 RESIZECONS(8)
Pages that refer to this page: ioctl_console(2), console_codes(4), console_ioctl(4)