RDP to your EC2-Ubuntu
1- Create security group with outpund to everywhere and inbound on port 3350 to your ip only 2- Create role of policy SsmManagedInstanceCore 3- Install ubuntu machine with public ip enabled in public subnet, without keypair 4-Connect to machine using ssm session then run the following commands sudo su - apt-get update apt install xrdp systemctl enable xrdp add-apt-repository ppa:gnome3-team/gnome3 apt-get install gnome-shell ubuntu-gnome-desktop passwd ubuntu 5-then connect using remote desktop application from your local machine to public ip of the ec2 machine

1- Create security group with outpund to everywhere and inbound on port 3350 to your ip only
2- Create role of policy SsmManagedInstanceCore
3- Install ubuntu machine with public ip enabled in public subnet, without keypair
4-Connect to machine using ssm session
then run the following commands
sudo su -
apt-get update
apt install xrdp
systemctl enable xrdp
add-apt-repository ppa:gnome3-team/gnome3
apt-get install gnome-shell ubuntu-gnome-desktop
passwd ubuntu
5-then connect using remote desktop application from your local machine to public ip of the ec2 machine