GPG = Gnu Privacy Guard

To secure file from unauthorised access with the password in Linux/Unix is very simple method 🙂

lets assume we have a secure file with some financials stuff called orders.xls

and we want to email it to our partners  and we  want to get sure just he is the only one will be able to read it

first we will encrypt the file with password

gpg -c orders.xls

it will create a file orders.xls.gpg   this file that will be sent to our partners

notice the gig extension in the end of the file

this file will be only decrypted if  our partners enter the correct password

decrypt the file with password