def capture_command        
      cmd = "#{@cutycapt_path} --url='#{@url}'"
      cmd += " --out='#{@folder}/#{@filename}'"
      cmd += " --max-wait=#{@max_wait}"
      cmd += " --delay=#{@delay}" if @delay
      cmd += " --user-agent='#{@user_agent}'"
      cmd += " --min-width='#{@min_width}'"
      cmd += " --min-height='#{@min_height}'"

      
      if determine_os == :linux and check_xvfb
        xvfb = 'xvfb-run --server-args="-screen 0, 1024x768x24" '
        xvfb.concat(cmd)
      else
        cmd
      end        
    end
def capture_command        
      cmd = "#{@cutycapt_path} --url='#{@url}'"
      cmd += " --out='#{@folder}/#{@filename}'"
      cmd += " --max-wait=#{@max_wait}"
      cmd += " --delay=#{@delay}" if @delay
      cmd += " --user-agent='#{@user_agent}'"
      cmd += " --min-width='#{@min_width}'"
      cmd += " --min-height='#{@min_height}'"

      
      if determine_os == :linux and check_xvfb
        xvfb = 'xvfb-run --server-args="-screen 0, 1024x768x24" '
        xvfb.concat(cmd)
      else
        cmd
      end        
    end
Produces the command used to run CutyCapt.

 @return [String]