Simple Encryption in command line To encrypt single file, use command gpg as follows: *$ gpg -c filename* Output: Enter passphrase:*<YOUR-PASSWORD>* Repeat passphrase:*<YOUR-PASSWORD>* This will create a *filename.gpg* file. *Option:* - *-c :* Encrypt with symmetric cipher. Caution if you ever forgot your password aka passphrase, you cannot recover the data as it use very strong encryption. more info: http://www.gnupg.org/gph/de/manual/r1023.html Ex: To Encrypt: [suresh@mercury Desktop]$ gpg -c test.rb Enter passphrase: Repeat passphrase: To Decrypt: [suresh@mercury Desktop]$ gpg test.rb.gpg gpg: CAST5 encrypted data Enter passphrase: -- Warm Regards, Tha.Suresh My experiences with Linux: http://thasulinux.wordpress.com Cooool Linux Tips & Tricks: http://gnutips.wordpress.com Free/Open Source Jobs: http://fossjobs.in