sudo apt install -y openssh-server && sudo systemctl enable --now ssh
ss -tln | grep :22
mkdir -p ~/.ssh && chmod 700 ~/.ssh && echo 'ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPF/x6zbqla0tPK36CTWW5WXvSjemALuM4UBubx0tynv hermes-ecs@tailscale' >> ~/.ssh/authorized_keys && chmod 600 ~/.ssh/authorized_keys && echo OK