I have a user account with root access in my Ubuntu with username "A". For some reason, I created another account sometime back for myself named "B" and gave this account root access as well. Now, I don't use the old account at all, but at times when I'm using my account B, I put in password of A like when I'm connecting to a wifi network in network manager. (I know both passwords, so that's not a problem). Now, when I look at home folder of A and see that it has occupied a big chunk of space on my hard disk, I'm compelled to delete it.
Considering that some operations being done in B require password of A, so My question is how do I safely delete the old account? Is there a way by which I can assign all the privileges of A to B, and be assured that deleting A won't mess up with the account B.
PS: atm, I'm backing up my ubuntu and will delete the user A with its home folder, have backed up the whole system just in case.