def read (filename, as: nil, quiet: false)
      Base64.decode64 sh("cat #{filename.shellescape} | base64", as: as, quiet: quiet)
    end
def read (filename, as: nil, quiet: false)
      Base64.decode64 sh("cat #{filename.shellescape} | base64", as: as, quiet: quiet)
    end
Read a host file.
 @api private