1. Define host access rules in /etc/hosts.allow and /etc/hosts.deny. Usually I only allow login to my private server from my home and work ip. If I have to login into my private server from some other network, I login to a computer at my workplace, login into …

You can use the following command to copy your SSH public key to a Linux server.

ssh-copy-id -i ~/.ssh/id_rsa.pub host_machine

However, if a Linux server runs the SSH deamon on a non default port (default is 22), you have to specify the port with option -p port. In …