Quickly SSH into servers for frequent sign-ins

config

Host my-vm
  HostName 129.9.9.9.9            # replace with the IP of your server, or the address
  User ubuntu                     # the user to sign in to 
  IdentityFile ~/.ssh/my-vm.key   # if a key is needed to authenticate
  
# Make replicas of the above block if more VMs to configure
# The file should be named as "config" (just that), and stored in ~/.ssh/ directory.
# Learned from: https://linuxize.com/post/using-the-ssh-config-file/

This helped me sign-in quickly to VMs that I needed to access several times, without having to remember their exact addresses, and writing the long command ssh -i ~/.ssh/my-key.key ubuntu@129.... everytime. Hope this helps others also!