Originally Posted by shane25119
A little Googling shows changing the username should work just the same as the password change:
Given Mint is pretty newbie friendly, I have to imagine the settings manager also has a way to do this (well, the XFCE version doesn't- but maybe GNOME/KDE do).
See man usermod...
The name of the user will be changed from login to login_name.
Nothing else is changed. In particular, the user's home directory name
should probably be changed to reflect the new login name.
In general, there are quite a few additional things that should/must be changed when a user name is changed, including any groups, file paths, keys, etc. derived from the original name and anything that references the name instead of the UID.
It depends somewhat on how active the original user has been and how long the account has existed - the longer and more active, the more likely unexpected things will break downstream.