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#### 15.1.43 timeout

If this variable is set, it specifies the time in seconds to wait for keyboard input before booting the default menu entry. A timeout of ‘`0`’ means to boot the default entry immediately without displaying the menu; a timeout of ‘`-1`’ (or unset) means to wait indefinitely.

If ‘`timeout_style`’ (see timeout_style) is set to ‘`countdown`’ or ‘`hidden`’, the timeout is instead counted before the menu is displayed.

This variable is often set by ‘`GRUB_TIMEOUT`’ (see Simple configuration handling).