mjhjmtu

I am trying to change my username, as per advice here however after running the following command:

CurrentName@HostName ~ $ sudo usermod -l TheNameIWantToChange -d /home/TheNameIWantToChange -m CurrentName

Terminal responds with:

CurrentName@HostName ~ $ usermod: user CurrentName is currently used by process 2491

And the username stays the same. Does anybody know how I could fix this and change my username after all?

To quote man usermod :

CAVEATS
 You must make certain that the named user is not executing any 
 processes when this command is being executed
 if the user's numerical user ID, the user's name, or the user's home 
 directory is being changed. usermod
 checks this on Linux, but only check if the user is logged in 
 according to utmp on other architectures.

So, you need to make sure the user you're renaming is not logged in.

Also, I note you're not running this as root. Either run it as root, or run with "sudo usermod".

I think that you should run the command with another user. Login with root, or other user, and try again. If you are in the x window with the user that you want to change, sounds logical that the commands fails.

I have the same issue using usermod, it fixed using the -m parameter, that move the content of the home directory to a new localization. Use this option in combination with -d (modify the user main directory, where there user ).

I suggest to see the man usermod command

This is mainly a problem with Ubutu where you don't have a root account to login from the first place. So this create a contradiction: I am a user in the sudoer group. I cannot change my own uid.

Not sure this is the best solution. I first create a fake account foo, add this to the sudo list. Then I login to the foo account and execute usermod -g MYOWNGID mylogin