    # File lib/chef/knife/core/bootstrap_context.rb, line 83
            def start_chef
              # If the user doesn't have a client path configure, let bash use the PATH for what it was designed for
              client_path = @chef_config[:chef_client_path] || 'chef-client'
              s = "#{client_path} -j /etc/chef/first-boot.json"
              s << " -E #{bootstrap_environment}" if chef_version.to_f != 0.9 # only use the -E option on Chef 0.10+
              s
            end