I've set up a Ubuntu system as a server, with the entire drive encrypted. It needs the password at bootup, after the BIOS hands over to GRUB (at least I think that's when).
I've since set up Wake-on-LAN, which starts the computer, which only gets as far as the drive-encryption password prompt. It doesn't get far enough to ask about login details, or to be able to ssh in.
Is there a way to enter the password remotely? If not, is there a way to boot into an unencrypted partition, and then decrypt the rest of the drive? If I need to repartition, is there a way to do it while keeping the settings etc?