How To Install Truecrypt on Debian
32 bit
sudo wget http://www.truecrypt.org/download/truecrypt-7.1a-linux-x86.tar.gz
or 64 bit
sudo wget http://www.truecrypt.org/download/truecrypt-7.1a-linux-x64.tar.gz
Extract
sudo tar -zxvf truecrypt*.gz
here is where I got hung. type the single quotes as well
sudo '/home/username/truecrypt-7.1a-setup-x64'
or alternatively, drag and drop the file into a terminal (as root) and it will produce the above command line
You may need to add your username to sudoers in order to mount your drive