ssh-keygen -t ed25519 -C "key name" -f <file_path>
ssh-keygen -t rsa -b 4096 -C "key name" -f <file_path>
ssh-keygen -f ~/.ssh/known_hosts -R "<IP or domain>"
~/.ssh/config.Host <IP or Domain> User <username> IdentityFile <ssh key file>
ssh-add <private key path>