TrueCrypt
Just a few notes on creating a TrueCrypt volume, mounting it and unmounting it on Linux.
Install truecrypt:
./truecrypt-7.0a-setup-console-x64
Create a truecrypt volume (must be big enough to contain the file(s) you want to encrypt:
truecrypt -c
(the volume I created was called test.tc)
Create a mountpoint for the truecrypt volume:
mkdir /dev/mapper/truecrypt0
mount the truecrypt volume:
truecrypt test.tc /dev/mapper/truecrypt0
Copy the file(s) to the truecrypt volume:
cp <FILENAMES> /dev/mapper/truecrypt0/
unmount the truecrypt volume
truecrypt -d /dev/mapper/truecrypt0