- Set the permissions of the private key file—my-first-ec2-instance.pem—to 400, which means the user/owner can read, can't write, and can't execute, whereas the group and others can't read, can't write, and can't execute it, by executing the chmod command, as follows:
$ chmod 400 my-first-ec2-instance.pem
- Get the public DNS of the EC2 instance and connect to it using a private key file as an ec2-user by executing the ssh command, as follows:
$ ssh -i my-first-ec2-instance.pem email@example.com
Once the command has executed successfully, we will be logged in to the EC2 instance and the output will look like the following:
- Switch to the root user from ec2-user by executing the sudo command: ...