Not able to login to EC2 Linux Instance as root user

By default root user is not allowed to login but you can use ec2-user as indicated by others.

Once you login with ec2-user you switch to root and change the SSH configuration.

$sudo su -

Edit the SSH daemon configuration file /etc/ssh/sshd_config

Make changes PermitRootLogin without-password

Reload the SSH daemon configuration by running:

/etc/init.d/sshd reload

Next time you just need to do $sudo su - and you would be a root user.

confirm this by id - command

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