Yes, it is probably in /etc/ssh/. What type of key depends on your distro and version, but here is a helpful explanation for Ubuntu: https://askubuntu.com/a/763

Yes, it is probably in /etc/ssh/. What type of key depends on your distro and version, but here is a helpful explanation for Ubuntu: https://askubuntu.com/a/76388 https://askubuntu.com/a/76388