linux網絡配置及排錯的一般流程
首先# ping www.baidu.com發現報錯未知此域名
# ping www.baidu.com
ping: unknown host www.baidu.com
之後# ping 8.8.8.8 -c 3 如果不通，則
檢視域名伺服器cat /etc/resolv.conf發現裡面設定了谷歌的公共DNS服務(如果沒有則需設定)
#cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 8.8.8.8
檢視網關問題：grep GATEWAY /etc/sysconfig/network-scripts/ifcfg-eth0
如果發現未設定，則增加預設網關：
如果報錯:不能連接配接。加下面這條
# route add default gw 192.168.40.1 //
都設定好之後你會發現已經可以ping 通網絡了
# ping www.baidu.com -c 3
PING www.a.shifen.com (103.235.46.39) 56(84) bytes of data.
64 bytes from 103.235.46.39: icmp_seq=1 ttl=44 time=348 ms
64 bytes from 103.235.46.39: icmp_seq=2 ttl=44 time=346 ms
64 bytes from 103.235.46.39: icmp_seq=3 ttl=44 time=348 ms
— www.a.shifen.com ping statistics —
3 packets transmitted, 3 received, 0% packet loss, time 2356ms
rtt min/avg/max/mdev = 346.636/347.584/348.094/0.670 ms
===================================================================================
附上一般網絡配置檔案所必須包含的東西/etc/sysconfig/network-scripts/ifcfg-eth0
# cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
HWADDR=00:0C:29:BE:56:DB
TYPE=Ethernet
UUID=5c0c914d-01ac-4543-8ffb-71cfc8f4fc60
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=static
IPADDR=192.168.1.11