How can you verify that FileVault 2 is enabled on a macbook?
You can check whether FileVault2 is enabled by opening System Preferences &gt; Security &amp; Privacy and looking at the FileVault tab.
Passwords for FV2 work slightly different than what you are used to from Linux:

The FV keys are stored on your computer
Your account password is required to unlock the keys (and therefore the encrypted disk)
You need to specifically allow users to unlock a FV encrypted disk so there could be user accounts which aren't allowed to unlock (and therefore can't login until an authorized user unlocks the disk first)