How to salvage a lvm/luks install from custom install

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http://unix.stackexchange.com – I was battling with setting up a Mint install on an encrypted hard-drive, and I think I partially succeeded. But I cannot boot the system because some configuration is not correct, and since I'm a Linux noob, I have no idea how to fix it now. The rough guidelines I followed was along the lines of http://blog.andreas-haerter.com/2011/06/18/ubuntu-full-disk-encryption-l... Although I partitioned with GParted. I also use only /boot as unencrypted ext4 partition mounted as /dev/sda3 (primary), swap and / on LVM volume which is logical, therefore actual / resides on /dev/sda5 which is in e (HowTos)