Linux 使用 shell 脚本获取 MAC 地址

目前所有提到的获取MAC地址的解决方案都使用eth0.

那么，有没有办法获取第一个可用接口的MAC地址.(也就是说，它有一个inet地址，我甚至不希望它有inet 6).

例如

eth0      Link encap:Ethernet  HWaddr <some addr>
          inet6 addr: <some addr> Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:123
          RX packets:123 errors:123 dropped:123 overruns:123 frame:123
          TX packets:123 errors:123 dropped:123 overruns:123 carrier:123
          collisions:123 txqueuelen:123 
          RX bytes:123 (123 MB)  TX bytes:123 (123 KB)
          Interrupt:123 Memory:00000000-00000000

eth1      Link encap:Ethernet  HWaddr <some addr>
          inet addr:<some addr>  Bcast:<some addr>  Mask:<some addr>
          inet6 addr: <some addr> Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:123 Metric:123
          RX packets:123 errors:123 dropped:123 overruns:123 frame:123
          TX packets:123 errors:123 dropped:123 overruns:123 carrier:123
          collisions:123 txqueuelen:123 
          RX bytes:123 (123 MB)  TX bytes:123 (123 KB)
          Interrupt:123 Memory:00000000-00000000

注意:我已经更改了输出的值.

所以在本例中，我希望HWaddr用于eth1，而不是eth0.