Quote:
Originally Posted by vkmgeek
Now how can I know which grub file is active?
and one more thing how can I make some grub active?
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I don't believe there's a (direct) way to know which partition the MBR references - you're expected to know your own setup.
You created it after all.
To use grub from any other system, just do a grub-install from that system. You can also do it manually, entering the appropriate commands - see the manual on the gnu site for grub.