-ExecStartPre=-/bin/sh -c "[ ! -f /etc/ssh/ssh_host_rsa_key ] && /usr/bin/ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key -C '' -N ''"
-ExecStartPre=-/bin/sh -c "[ ! -f /etc/ssh/ssh_host_dsa_key ] && /usr/bin/ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key -C '' -N ''"
-ExecStartPre=-/bin/sh -c "[ ! -f /etc/ssh/ssh_host_ecdsa_key ] && /usr/bin/ssh-keygen -t ecdsa -f /etc/ssh/ssh_host_ecdsa_key -C '' -N ''"
-ExecStartPre=-/bin/sh -c "[ ! -f /etc/ssh/ssh_host_ed25519_key ] && /usr/bin/ssh-keygen -t ed25519 -f /etc/ssh/ssh_host_ed25519_key -C '' -N ''"