How to setup TrueCrypt on Ubuntu
1) Goto the TrueCrypt website, click download go down the page till you see Linux then select your package you need theres a choice from regular and server edition and 32 bit and 64 bit.
2) Once you've downloaded the file. Install it using the Ubuntu Software Center just by opening it up in the Ubuntu Software Center.
3) Once installed, open TrueCrypt and select the 'Create Volume' option. Select 'Create a encrypted file container', next select 'Standard TrueCrypt Volume'.
4) Now select the location you want the Encrypted File will be saved (This is the file which everything you put on the Crypted drive later on is stored. Its fully encrypted. Dont worry).
5) Encryption Algorithm, select AES>TWOFISH>SERPENT.
Hash Algorithm, select SHA512.
6) Volume size is how big you want the Encrypted Drive to be, i usaully do between 10-50Gb.
7) You're password is now needed, this is the encrypted password that you will need to enter in every time you want to mout the encrypted file to a drive and use the drive and access all your files and folders/etc. I suggest atleast 25 Characters, lowercase and uppercase and numbers. MAKE SURE TO WRITE IT DOWN AND HIDE IT!
8) Select Yes or No, know just keep pressing next till you get to the Volume Format page now just click Format and when its finished your File is ready and encrypted.
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How to mount the file to a device:
1) Select the file you wish to mount (The encrypted file, you made above)
2) Click on a Drive and select Mount.
3) Now type in your Passcode you made for the File.
4) When mounted double click the Drive with the file name next to it. (Shows the path to the encrypted file.)
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This is my first tutorial, i will upload a video soon! Please comment if you get confused and i can help you via skype or PM!