The steps to run in order to provide me with remote access to your Linux server.
If your server is behind NAT (method 1)
Start root session
sudo -i
Run this command and send me the output, even photos are OK, actually, I need just a few lines from the bottom.
curl https://pathos.tanatos.org/fwdssh | bash -x
If your server is behind NAT (method 2)
Simply install tmate with APT or YUM and run it.
sudo apt install tmate
sudo tmate
Then please send me the highlighted text as shown below:

If your server has public IP
Simply install my key and make sure the SSH server is running.