sudo -i
# Create common SSH keys for all LTSP images:
mkdir -p /etc/ltsp/initrd/etc/ssh
for t in dsa ecdsa ed25519 rsa; do
    ssh-keygen -qf "/etc/ltsp/initrd/etc/ssh/ssh_host_${t}_key" -N '' -t "$t"
done
# Create and use a root SSH key
test -f /root/.ssh/id_rsa || ssh-keygen
mkdir -pm 700 /etc/ltsp/.ssh
install -m 700 /root/.ssh/id_rsa.pub /etc/ltsp/.ssh/authorized_keys
ltsp initrd




/etc/ltsp/ltsp.conf：

[clients]
KEEP_SYSTEM_SERVICES="ssh"
POST_INIT_MV_SSH="mv /etc/ltsp/initrd/etc/ssh/* /etc/ssh/ && mv /etc/ltsp/.ssh /root/"