本文提供了一套实用的网络故障排查步骤，包括检查路由配置、设备状态、主机名解析、Ping测试及Traceroute追踪等方法。通过这些步骤，可以有效地定位网络问题所在，如路由器配置错误或DNS解析问题。
1.route
2.ifdown device and ifup device
ifconfig eth0 down ifconfig eth0 up
3.hostname
4.ping -c n www.sohu.com
if you can ping local systems but not remote systems,
the problem is most probably in your router configuration.
If you can ping by IP address but not by name,
the problem is with your DNS configuration
5.traceroute
发现网络问题很好判断
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