grub: timeout
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' (⇒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' (⇒Simple
configuration).
Info Catalog
grub: theme
grub: Special environment variables
grub: timeout_style