I get the root privilege when I type sudo. But when su asks for the Password, which I type in, the terminal says su: Authentication Failure

Received disconnect from 123.123.123.123: 2: Too many authentication failures for user I tried wiping .ssh/known_hosts thinking it was due to reusing an IP address and having a … Ubuntu Tips: How To Enable Root User ( Super User ) in Ubuntu Sep 25, 2009 ubuntu - Cron Authentication Failure error in Linux To check, su to the user and check if you get Authentication Failure, e.g.: $ sudo su - Your account has expired; please contact your system administrator su: Authentication failure (Ignored) To fix: update the expiration on the account: sudo chage -M 300 root Or whatever username you're having issues with in place of root above. solution AUTHENTICATION FAILURES on ubuntu - YouTube

AD (PAM) authentication stopped working after - Ask Ubuntu

linux - su: Authentication failure on Ubuntu - Super User

HOWTO: Configure Ubuntu for Active Directory Authentication

Received disconnect from 123.123.123.123: 2: Too many authentication failures for user I tried wiping .ssh/known_hosts thinking it was due to reusing an IP address and having a … Ubuntu Tips: How To Enable Root User ( Super User ) in Ubuntu Sep 25, 2009 ubuntu - Cron Authentication Failure error in Linux To check, su to the user and check if you get Authentication Failure, e.g.: $ sudo su - Your account has expired; please contact your system administrator su: Authentication failure (Ignored) To fix: update the expiration on the account: sudo chage -M 300 root Or whatever username you're having issues with in place of root above. solution AUTHENTICATION FAILURES on ubuntu - YouTube Oct 12, 2012