1、route -n
    查看是设置了网关

    1. # ping 8.8.8.8
    2. PING 8.8.8.8 (8.8.8.8): 56 data bytes
    3. ping: sendto: Network is unreachable

    2、设置dns 文件

    1. cat /etc/resolv.conf
    2. nameserver 8.8.8.8
    3. nameserver 8.8.4.4
    4. nameserver 114.114.114.114