3 examples for ssh-keygen

  # Creates a new ssh key, using the provided email as a label Generating public/private rsa key pair.
ssh-keygen -t rsa -b 4096 -C "your_email@example.com"
        

  # generate a key without any keyboard interaction
ssh-keygen -t dsa -N '' -f path/to/keyfile -y
        

  # remove host from known_hosts file
ssh-keygen -R hostname