buildroot 网口配置
首先查看一下网络接口，看到eth0被默认配置了一个静态ip地址
ifconfig
# 输出为
root@zqboard:~# ifconfig
awlink0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
UP RUNNING NOARP MTU:16 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:300
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
awlink1 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
UP RUNNING NOARP MTU:16 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:300
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:1
eth0 Link encap:Ethernet HWaddr 6A:A4:8B:C0:28:25
inet addr:192.168.1.77 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::a45a:aa59:443b:e329/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3 errors:0 dropped:0 overruns:0 frame:0
TX packets:9 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:744 (744.0 B) TX bytes:1325 (1.2 KiB)
Interrupt:41
ip6tnl0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet6 addr: fe80::fe15:fd2c:a5eb:61b6/64 Scope:Link
UP RUNNING NOARP MTU:1452 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:4 dropped:4 overruns:0 carrier:4
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:2 errors:0 dropped:0 overruns:0 frame:0
TX packets:2 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:140 (140.0 B) TX bytes:140 (140.0 B)
静态ip
对于静态ip，我们直接修改 /etc/eth0.conf即可
改完后，运行
/etc/init.d/S40network restart
动态获取ip
直接执行下面的语句即可
udhcpc -i eth0