Questions about multiple login names in ubuntu

Have you solved the problem of multiple login names in ubuntu? This morning, I found a solution, which is very simple. The following figure shows Li Si's administrator permissions. delete them one by one. I hope to help you. Li Si @ Li Si :~ $ Sudodeluserqmaild [sudo] password... is the problem of multiple login names in ubuntu solved? This morning, I found a solution, which is very simple. The following figure shows Li Si's administrator permissions. delete them one by one. I hope to help you. Li Si @ Li Si :~ $ Sudo deluser qmaild [sudo] password for Lee 4: Removing user 'qmaild'... Warning: group 'nofiles' has no more members. Done. Li Si @ Li Si :~ $ Sudo deluser aliasRemoving user 'Alias'... Warning: group 'nofiles' has no more members. Done. Li Si @ Li Si :~ $ Sudo deluser qmailrRemoving user 'qmailr'... Warning: group 'qmail' has no more members. Done. Li Si @ Li Si :~ $ Sudo deluser qmailqRemoving user 'qmailq'... Warning: group 'qmail' has no more members. Done. Li Si @ Li Si :~ $ Sudo deluser qmailpRemoving user 'qmailp'... Warning: group 'nofiles' has no more members. Done. Li Si @ Li Si :~ $