Cacher is the code snippet organizer for pro developers

# local instance
ssh-keygen -b 2048 -P '' -f ~/.ssh/id_rsa
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys

# remote instance
ssh-copy-id -i ~/.ssh/id_rsa.pub 192.168.1.1

# more: https://www.digitalocean.com/community/tutorials/how-to-use-ssh-to-connect-to-a-remote-server-in-ubuntu