The authorized_keys tool will generate SSH public/private keypairs
for a number of SSH keytypes using the ssh-keygen tool.
Already existing SSH keys will not be modified.
Beware: An empty passphrase is used which means a lower security level than what may be required by your organization.
The authorized_keys tool will add any new SSH keys to the $HOME/.ssh/authorized_keys file,
but already existing keys in the file will not be modified.