TestOut Linux Pro Practice Test 2025 – Complete Exam Prep Guide

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What is the consequence of setting GRUB_TIMEOUT to -1?

The system will not boot

The menu will wait indefinitely for user selection

Setting GRUB_TIMEOUT to -1 means that the boot menu will wait indefinitely for the user to make a selection. This configuration is often used in situations where the administrator wants to allow the user ample time to choose a specific boot option, such as a different kernel or safe mode, without being rushed by a countdown timer. If a user does not select an option, the menu remains displayed, giving the flexibility to make a selection at any point until a choice is made or until the user intervenes.

In contrast, a GRUB_TIMEOUT value set to 0 would skip the menu entirely, immediately booting the default option, while a positive integer would limit the wait time to that many seconds before proceeding. Therefore, setting it to -1 provides the unique behavior of an indefinite pause on the GRUB menu, allowing for user interaction as needed.

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The system will boot immediately without waiting

The system will switch to rescue mode

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