I'm running a production-level Amazon ec2 instance, and I want to close out root privileges to all users. Normally, when one logs in to the instance as ec2-user, the ec2-user immediately gets sudo privileges, which I am trying to do away with in order to ensure security.
I was able to set a new password for the root user, and I went into /etc/sudoers to try and remove the ec2-user from sudo privileges, but that user isn't even listed in the file. Does anybody know how I can remove ec2-user from sudo privileges on an Amazon ec2 instance running the default linux installation?
Best Answer
Check /etc/sudoers.d/cloud-init file, ec2-user default user is there, just delete this file.