Which of the following options is used in a GRUB Legacy configuration file to define the amount of time that the GRUB menu will be shown to the user?
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A. B. C. D.C
The correct answer is C. timeout.
GRUB Legacy is a popular boot loader for Linux systems that has been superseded by GRUB2. In the GRUB Legacy configuration file, also known as menu.lst, various settings can be configured, including the timeout setting.
The timeout setting specifies the number of seconds that the GRUB menu will be displayed before the default operating system is automatically booted. The default value for timeout is 5 seconds, but it can be set to any value greater than 0.
For example, if timeout is set to 10 seconds, the GRUB menu will be displayed for 10 seconds before the default operating system is automatically booted. During this time, the user can select a different operating system or enter advanced options by pressing a specific key.
To set the timeout value in the GRUB Legacy configuration file, add or modify the following line:
timeout <seconds>
For example, to set the timeout value to 10 seconds, add the following line:
timeout 10
Note that the other options listed in the question are not valid settings in the GRUB Legacy configuration file. "hidemenu" and "showmenu" are not valid settings in GRUB Legacy, and "splash" is used to specify a splash screen image to be displayed during the boot process, but it does not control the duration of the GRUB menu.