Updates

The ubuntu operating system should be periodically updated

Firstly, update the ubuntu packages:

sudo apt-get update

Secondly, upgrade the packages:

sudo apt-get upgrade

Thirdly, exit bash session.

Fourthly, reboot the EC2 instance (Reboot your instance):

EC2 > Instance state > Reboot instance

Note: After clicking on “Reboot instance” it took a few minutes before I was able to to SSH back into my instance or connect to it using EC2 Instance Connect.