"vi" is not an ordinary editor. it is a popular among programmers. in our lab most of them struggle to do copy, paste like simple things in it.. it's hard to get for the first time, but later only we can realize how awesome the "vi" is. my fav. commands: vi has two modes: 1. command mode (press esc) in command mode our cursor will point at the bottom followed by : 2. edit mode (press i) normal edit mode we can type whatever we want