I was following the advice on this site: http://www.techrepublic.com/article/how-to-easily-encryptdecrypt-a-file-in-linux-with-gpg/
I ran this command: gpg -c test.txt.
But then it created a separate file called test.txt.gpg and it left the original file. I want to encrypt a certain file so that it can't be accessed with a live CD. How can I password protect the original file?
I am using ubuntu and don't want to download a special program.