Set the default boot entry for grub
grub-set-default [OPTION] entry
Set the default boot entry for GRUB.
-h, --help
print this message and exit
-v, --version
print the version information and exit
--root-directory=DIR
Use the directory DIR instead of the root directory
ENTRY is a number (counting from 0) or the special keyword `default\'.
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This manual page was written by Patrick Schoenfeld <[email protected]>, for the Debian project (but may be used by others).