how to add ssh key in ubuntu code example

Example 1: ubuntu generate ssh key

ssh-keygen -t rsa -C "[email protected]"

Example 2: how to generate ssh key in linux

ssh-keygen -t rsa -b 4096
ssh-keygen -t dsa
ssh-keygen -t ecdsa -b 521
ssh-keygen -t ed25519

Example 3: ubuntu create a ssh key

cat ~/.ssh/id_rsa.pub | ssh username@remote_host "mkdir -p ~/.ssh && touch ~/.ssh/authorized_keys && chmod -R go= ~/.ssh && cat >> ~/.ssh/authorized_keys"