How do I change my username? [duplicate]

My first name is Lluis but always Ubuntu changes my name as Llus when my computer starts as Ubuntu. I don't understand why this 'i' is missed.

Solution 1:

If you just want to change the name that appears at startup, go to System Settings -> User Accounts.

Click the "Unlock" button at the top right of that box. Then click the name to the right, and retype it.

This won't affect your shell/system username at all, only your display name; if you were looking to change the system username too you will need to do something more along the lines of the other answer... though personally I would say it'd be safer to just make a new account and start over in that case; there could be (non-system) files elsewhere that reference your old username in some fashion or other, and these won't necessarily be updated with your new username if you do change it.