User not in the sudoers file This incident will be reported can happens dues to multiple reasons and it’s up to us that how we identify the issue. We know that in UNIX like systems root is the super user account. It is a great mistake, if you have only and only root user in your operating system because a single mistake or wrong command can cause a great problem as well. User not in the sudoers file This incident will be reported Well, back to point, on Debian based Linux flavors this error can be a reason of broken sudo or easy term corrupted sudoers. Broken sudoers has multiple reason, most important are as below; User must resides in the sudo or admin group and one should not remove it. The /etc/sudoers file was altered to prevent users in sudo or admin group from elevating their privileges to that of root using sudo command. Confirm if the correct permission (dr--r----- or 0440) are setup on /etc/sudoers. We need the sudo command to gain super user privileges to perform ...