Last login: Mon May 20 20:21:30 on ttys002
"username" is not in the sudoers file. This incident will be reported.
WARNING: Improper use of the sudo command could lead to data loss
or the deletion of important system files. Please double-check your
typing when using sudo. Type "man sudo" for more information.
To proceed, enter your password, or type Ctrl-C to abort.
What can I do to update the sudoers file?
odds are the account you are logged into is not an "admin" account but either standard or managed