LINUX安裝好后無法訪問網絡
在虛擬機安裝好新的LINUX系統后，ping www.baidu.com ，發現無法ping通。
鍵入ifconfig查詢配置：
| eno16777728: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 |
| ether 00:0c:29:3e:ad:2d txqueuelen 1000 (Ethernet) |
| RX packets 0 bytes 0 (0.0 B) |
| RX errors 0 dropped 0 overruns 0 frame 0 |
| TX packets 0 bytes 0 (0.0 B) |
| TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 |
| lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 |
| inet 127.0.0.1 netmask 255.0.0.0 |
| inet6 ::1 prefixlen 128 scopeid 0x10<host> |
| loop txqueuelen 0 (Local Loopback) |
| RX packets 942 bytes 79580 (77.7 KiB) |
| RX errors 0 dropped 0 overruns 0 frame 0 |
| TX packets 942 bytes 79580 (77.7 KiB) |
| TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 |
得到本機的網卡是eno16777728
然后，重啟網卡服務：service network restart
再次查詢：ifconfig,發現依舊如上所示，並且無法訪問網絡。
修改網卡配置： root模式下vim /etc/sysconfig/network-scripts/ifcfg-eno16777728（最后的數字不一定一致，不要照搬，根據查詢出來的配置信息靈活替換），然后將文件里最后一項的ONBOOT=no在插入模式中修改為yes並保存退出,以后計算機自動啟動網卡。
現在手動啟動網卡服務ifup eno16777736
重新鍵入ifconfig：
| eno16777728: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 |
| inet 192.168.81.134 netmask 255.255.255.0 broadcast 192.168.81.255 |
| inet6 fe80::20c:29ff:fe3e:ad2d prefixlen 64 scopeid 0x20<link> |
| ether 00:0c:29:3e:ad:2d txqueuelen 1000 (Ethernet) |
| RX packets 125 bytes 14963 (14.6 KiB) |
| RX errors 0 dropped 0 overruns 0 frame 0 |
| TX packets 147 bytes 15265 (14.9 KiB) |
| TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 |
| lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 |
| inet 127.0.0.1 netmask 255.0.0.0 |
| inet6 ::1 prefixlen 128 scopeid 0x10<host> |
| loop txqueuelen 0 (Local Loopback) |
| RX packets 946 bytes 80000 (78.1 KiB) |
| RX errors 0 dropped 0 overruns 0 frame 0 |
| TX packets 946 bytes 80000 (78.1 KiB) |
| TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 |
問題解決，網卡服務成功啟動，並且后續不需要每次都手動啟動網卡服務
本文參照：http://114193107.blog.51cto.com/3025337/1676433