1. 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

2. 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 ec2-user@ec2-172-31-34-99.compute-1.amazonaws.com

Once the command has executed successfully, we will be logged in to the EC2 instance and the output will look like the following:

3. Switch to the root user from ec2-user by executing the sudo command:

[ec2-user@ip-172-31-34-99 ~]$ sudo su

4. Install Go using the Red Hat package manager,  yum, as follows:

[root@ip-172-31-34-99 ~]$ yum install -y go