centos无法访问外网

[root@localhost ~]# curl  www.baidu.com curl: (6) Could not resolve host: www.baidu.com; 未知的错误

[root@localhost ~]# route -n Kernel IP routing table Destination     Gateway         Genmask         Flags Metric Ref    Use Iface 0.0.0.0         192.168.1.1     0.0.0.0         UG    100    0        0 ens192 192.168.1.0     0.0.0.0         255.255.255.0   U     100    0        0 ens192 192.168.122.0   0.0.0.0         255.255.255.0   U     0      0        0 virbr0

[root@localhost ~]# vim /etc/resolv.conf

# Generated by NetworkManager nameserver 218.30.19.50 nameserver 8.8.8.8 ~                                                                                                                                                               ~

[root@localhost ~]# route add default gw 192.168.1.1

[root@localhost ~]# curl www.baidu.com nbsp;html&gt; <!--STATUS OK--> <meta><meta><meta><link><title>百度一下，你就知道</title>  <div> <div> <div> <div> <div> <div> @@##@@ </div> <form> <input> <input> <input> <input> <input> <input><span><input></span><span><input></span> </form> </div> </div> <div> <a>新闻</a> <a>hao123</a> <a>地图</a> <a>视频</a> <a>贴吧</a> <noscript> <a>登录</a> </noscript> <script>document.write(&#39;<a href="http://www.baidu.com/bdorz/login.gif?login&tpl=mn&u=&#39;+ encodeURIComponent(window.location.href+ (window.location.search === "" ? "?" : "&")+ "bdorz_come=1")+ &#39;" name="tj_login" class="lb">登录&#39;);</script> <a>更多产品</a> </div> </div> </div> <div> <div> <p> <a>关于百度</a> <a>About Baidu</a> </p> <p>©2017 Baidu <a></a>使用百度前必读  <a>意见反馈</a> 京ICP证030173号  @@##@@ </p> </div> </div> </div>