Host m-server
  HostName m-server.home.lan
 
Host rpi5
  HostName rpi5.home.lan

Host rack
  HostName rack.home.lan

Host amd
  HostName amd.home.lan
  
Host nas
  HostName nas.home.lan
  User admin

Host router
  HostName router.home.lan
  User root
Host external
  HostName 193.168.144.164
  User root
Host *
    User jd
    IdentityFile ~/.ssh/id_rsa
    StrictHostKeyChecking no