View source for dmcrypt - open encrypted drive with key

configure you box to open the partition / disk using a key
 
example using gentoo

    mybox home # '''vi /etc/conf.d/dmcrypt''' 

added lines...
    target=home
    source='/dev/sdb1'
    key='/root/hdpw'

*** the following took a long time...
  mybox home # '''dd if=/dev/random of=/root/hdpw'''
     bs=1 count=512
     512+0 records in
     512+0 records out
     512 bytes (512 B) copied, 2821.2 s, 0.0 kB/s

   mybox home # chmod 400 /root/hdpw

   mybox home # '''cryptsetup luksAddKey /dev/sdb1 /root/hdpw'''
 Enter any passphrase: 

All done, test with a reboot.

[[category:disk encryption]]