#ヘッドノード
Host head
  HostName      xxx.xxx.xxx.xxx
  User          username_head
  IdentityFile  ~/.ssh/id_ed25519

#計算ノード
Host node11
  HostName      192.168.0.11
  User          username_node11
  ProxyCommand  ssh -W %h:%p head
  
Host node12
  HostName      192.168.0.12
  User          username_node12
  ProxyCommand  ssh -W %h:%p head
  
#以下略