Lightsail ssh client not working from browser after upgrade the Ubuntu version 16.04 to 18.04. This is very headache to find and resolve the issues. I am here sharing to help our developers to resolve easily.


1) Open TWO ssh connection terminal or putty. (one could be browser ssh).
2) Do all the upgrade functionality in one terminal.



3) Run below commands
    sudo sed -i 's/^Ciphers .*/Ciphers +aes256-cbc,aes192-cbc,aes128-cbc/' /etc/ssh/sshd_config
    sudo systemctl restart sshd

4) Close both terminals then Restart the instance from lightsail.

I hope this should work. Thanks