Host t1
  User ubuntu
  HostName t1.home.antiprocess.net
  IdentityFile ~/.ssh/id_rsa
Host t2
  User ubuntu
  HostName t2.home.antiprocess.net
  IdentityFile ~/.ssh/id_rsa
Host t3
  User ubuntu
  HostName t3.home.antiprocess.net
  IdentityFile ~/.ssh/id_rsa
Host t4
  User ubuntu
  HostName t4.home.antiprocess.net
  IdentityFile ~/.ssh/id_rsa