# File lib/rhc/ssh_helpers.rb, line 472
    def check_ssh_executable!(path)
      if not path
        discover_ssh_executable.tap do |ssh_cmd|
          raise RHC::InvalidSSHExecutableException.new("No system SSH available. Please use the --ssh option to specify the path to your SSH executable, or install SSH.#{windows? ? ' We recommend this free application: Git for Windows - a basic git command line and GUI client http://msysgit.github.io/.' : ''}") unless ssh_cmd or has_ssh?
        end
      else
        bin_path = split_path(path)[0]
        raise RHC::InvalidSSHExecutableException.new("SSH executable '#{bin_path}' does not exist.") unless File.exist?(bin_path) or File.exist?(path) or exe?(bin_path)
        raise RHC::InvalidSSHExecutableException.new("SSH executable '#{bin_path}' is not executable.") unless File.executable?(path) or File.executable?(bin_path) or exe?(bin_path)
        path
      end
    end