This error for ssh can be solved with the following information.
-Reattempt your SSH connection, adding the following to your command line:
-oHostKeyAlgorithms=+ssh-rsa
ie.
ssh -oHostKeyAlgorithms=+ssh-rsa fatjacks@69.160.53.87
or
ssh -oHostKeyAlgorithms=+ssh-dsa fatjacks@69.160.53.873
You can also try modifying the local(your computer) SSH configuration to add the below values to make this change permanent.
-Type sudo nano ~/.ssh/config, then enter your administrative password if prompted.
Host controls
HostName domain.com
IdentityFile ~/.ssh/domain.pem
User root
Port 22
ServerAliveInterval 120
HostKeyAlgorithms +ssh-rsa