I wrote "sudo bash". The username was changed to "root" of the original username. unsure of what I should do in "root", I closed Putty.
After re-opening Putty, with the password of the name "login" correct, the tester, Putty's screen showed "Access Denied."
please advise how I can log in again. Does the login do not work with the "sudo bash" command?
Thank you for your advice.