change username on elementary OS properly

Question

How to change username on elementary OS — e.g. linux@eos to dago@eos properly?

Answer 1

This has been answered in another question on another StackExchange site but this is basically what you need to do:

While the user you need to modify is logged out and you're logged in as another sudoer user, do the following:

sudo usermod -l newUsername oldUsername

This changes your username but not your home folder. If you're okay with having a different home folder name from your username, you're pretty much done. Otherwise, refer to the linked answer for more details.