Linux开机自动联网

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作者：海鹰
此教程讲述让CentOS在开机的时候自动联网
版权所有，未经允许，请勿随意转载。

1. 操作

1. 进入网卡配置目录
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cd /etc/sysconfig/network-scripts/
2. 查看当前网卡的配置
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ifconfig

test: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.8.150  netmask 255.255.255.0  broadcast 192.168.8.255
        inet6 fe80::20c:29ff:fe48:8f05  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:48:8f:05  txqueuelen 1000  (Ethernet)
        RX packets 2793091  bytes 416875435 (397.5 MiB)
        RX errors 0  dropped 3711  overruns 0  frame 0
        TX packets 340553  bytes 46409458 (44.2 MiB)
        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 722053  bytes 47173052 (44.9 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 722053  bytes 47173052 (44.9 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
        ether 52:54:00:91:85:29  txqueuelen 0  (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
3. 选择对应的网卡配置文件
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ls -al

total 244
drwxr-xr-x. 2 root root  4096 Aug  5 15:19 .
drwxr-xr-x. 6 root root  4096 Aug  5 15:19 ..
-rw-r--r--. 1 root root   332 Aug  5 14:53 ifcfg-test
-rw-r--r--. 1 root root   254 Sep 16  2015 ifcfg-lo
lrwxrwxrwx. 1 root root    24 Aug  5 10:19 ifdown -> ../../../usr/sbin/ifdown
-rwxr-xr-x. 1 root root   627 Sep 16  2015 ifdown-bnep
-rwxr-xr-x. 1 root root  5817 Sep 16  2015 ifdown-eth
-rwxr-xr-x. 1 root root  6196 Dec  1  2015 ifdown-ib
-rwxr-xr-x. 1 root root   781 Sep 16  2015 ifdown-ippp
-rwxr-xr-x. 1 root root  4201 Sep 16  2015 ifdown-ipv6
......

# 在第2步可以看到网卡的配置名为test
# 因此，ifcfg-test就是即将进行修改的文件
4. 找到对应的配置
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vi ifcfg-test

# 找到ONBOOT
# 默认情况下，ONBOOT=no，将值修改为yes即可

ONBOOT=yes

# 修改完保存退出即可

2. 结语

本教程到此结束，欢迎指正，互相交流。
版权所有，未经允许，请勿随意转载。