Linux account (change account) ~ computer science

Tip: Master and data nodes make same user id in linux.
(because to get same home folder name)

Add a new user, e.g. "temporary". If you are still in TTY1 (Ctrl+Alt+F1):
```
$ sudo adduser temporary
```
set the password and just type enter exit. This should bring you to the original login prompt, if not type exit again.
Change the account type of your new temporary user to administrator:
In tty7 (Ctrl+Alt+F7, "normal" desktop) login in to your usual account. Change his privileges through the gui: System settings > users account. Click Unlock then change account type to "administrator".
Log out again.
Return to tty1: Login with the 'temporary' user account and password.To change username (it is probably best to do this without being logged in):
```
usermod -l newUsername oldUsername
```
To change home-folder, use
```
usermod -d /home/newHomeDir -m newUsername
```
exit (until you get the login prompt)
Go back to TTY7 (Ctrl+Alt+F7) to login on the GUI/normal desktop screen and see if this works.

Delete temporary user and folder:

sudo deluser temporary
sudo rm -r /home/temporary

Ref: http://askubuntu.com/questions/34074/how-do-i-change-my-username

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