Amazon EC2-instance: I made a user 'admin' and copied ec2-user's keys with proper permission. After successful login, i tried to do sudo su for root access, it says 'admin is not in the sudoers file. This incident will be reported.'
However i can do sudo su with ec2-user account and can gain root access.
What is sudoer file? how does ec2-user and admin different in config wise?
# useradd -m admin # cp -R /home/ec2-user/.ssh /home/admin # chown -R admin:admin /home/admin/.ssh
connect by putty: login as: admin Authenticating with public key "xxx" [admin@ip-xx-xx-xx-xx ~]$ sudo su
We trust you have received the usual lecture from the local System Administrator. It usually boils down to these three things: 1) Respect the privacy of others. 2) Think before you type. 3) With great power comes great responsibility.
[sudo] password for admin: admin is not in the sudoers file. This incident will be reported.