It’s a universal way.
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#old rsa1 key, not recommended #ssh-keygen -N "" -t rsa1 -f /etc/ssh/ssh_host_key #rsa and dsa keys ssh-keygen -N "" -t rsa -f /etc/ssh/ssh_host_rsa_key ssh-keygen -N "" -t dsa -f /etc/ssh/ssh_host_dsa_key #ecdsa key ssh-keygen -N "" -t ecdsa -f /etc/ssh/ssh_host_ecdsa_key #for archlinux etc ssh-keygen -N "" -t ed25519 -f /etc/ssh/ssh_host_ed25519_key |
Do not forget to restart OpenSSH server.
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