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1. Connect through SSH without password

   On the client machine

   Generate keys (without passphrase)

   $ ssh-keygen -t rsa
   

   Copy the public key on the server

   $ scp ~/.ssh/id_rsa.pub nst@10.0.1.2:~/new_key
   

   On the server machine

   $ cat ~/new_key >> ~/.ssh/authorized_keys 
   $ rm new_key