Encrypted several drives, same password to unencrypt during boot/mount. Any way to just write the password once? So, I've got a few drives and a few linux partitions. I'm planning on rebuilding some of it that doesn't have personal data on it. Now, when encrypted, I have to write the password for all the mounts that are encrypted, during boot.

Is there a way to write once and let it use the same password to open up the rest, considering it's the same password?

I hope I made my goal understandable. I am the only user and when I'm not near it, it's turned off.

I want to lock my system down as much as I can.

PS: Which is the best tool/method to achieve this? I'd like everything to be encrypted, including boot.