string(307) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=inux%E4%BB%8E%E5%8F%A6%E5%A4%96%E4%B8%80%E5%8F%B0%E6%9C%8D%E5%8A%A1%E5%99%A8%E6%8B%B7%E8%B4%9D%E6%96%87%E4%BB%B6%E7%9A%84%E5%91%BD%E4%BB%A4 => Failed to connect to 101.89.143.195 port 38205: Connection refused"
inux从另外一台服务器拷贝文件的命令
