Ubuntu 10 useful code

At first click ctrl+alt+t  Now write code & click Enter
1.Off button – sudo halt
2.Restart– sudo reboot
3.Date – date
4.Calendar – cal
5.Disk usage- df
6.Last restart ar por pc running time- uptime
7.Account detail- who ami
8.System kernel – uname
9.Future directory – is

10.Go to Application Write name ,example:  write the app name vlc,firefox, etc.