修改完成后需重启一下系统，再次查看网卡服务名已经更改
[root@rac01 ~]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:50:56:95:09:76
inet addr:10.109.67.81  Bcast:10.109.67.255  Mask:255.255.255.0
inet6 addr: fe80::250:56ff:fe95:976/64 Scope:Link
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
RX packets:985 errors:0 dropped:0 overruns:0 frame:0
TX packets:61 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:74395 (72.6 KiB)  TX bytes:6527 (6.3 KiB)
　　3、网卡eth0被删除后，新加的网卡成了eth1，如何让从eth0开始
[root@rac01 ~]# ifconfig
eth1      Link encap:Ethernet  HWaddr 00:50:56:95:09:76
inet addr:10.10.10.110 Bcast:10.10.10.111  Mask:255.255.255.0
inet6 addr: fe80::250:56ff:fe95:976/64 Scope:Link
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
RX packets:830 errors:0 dropped:0 overruns:0 frame:0
TX packets:57 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:63700 (62.2 KiB)  TX bytes:6259 (6.1 KiB)
eth2      Link encap:Ethernet  HWaddr 00:0C:29:1E:F6:B7
inet addr:10.10.10.120  Bcast:10.10.10.111Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe1e:f6b7/64 Scope:Link
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
RX packets:777 errors:0 dropped:0 overruns:0 frame:0
TX packets:11 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:54938 (53.6 KiB)  TX bytes:746 (746.0 b)
　　解决方法：
　　同2问题类似，即可以手动的修改70-persistent-net.rules文件，将对应的MAC地址与网卡序号改成想要的，也可以直接删除该文件，重启系统后，RedHat会自动的创建该文件，并从0开始计数。
　　删除文件，重启系统
　　[root@rac01 ~]# mv /etc/udev/rules.d/70-persistent-net.rules /etc/udev/rules.d/7
　　0-persistent-net.rules.bak
　　[root@rac01 ~]# reboot
　　再次查看，会发现已经从eht0开始
[root@rac01 ~]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:50:56:95:09:76
inet addr:10.109.67.81  Bcast:10.109.67.255  Mask:255.255.255.0
inet6 addr: fe80::250:56ff:fe95:976/64 Scope:Link
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
RX packets:206 errors:0 dropped:0 overruns:0 frame:0
TX packets:68 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:19282 (18.8 KiB)  TX bytes:7215 (7.0 KiB)
eth1      Link encap:Ethernet  HWaddr 00:0C:29:1E:F6:B7
inet addr:10.109.67.83  Bcast:10.109.67.255  Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe1e:f6b7/64 Scope:Link
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
RX packets:131 errors:0 dropped:0 overruns:0 frame:0
TX packets:11 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:8736 (8.5 KiB)  TX bytes:746 (746.0 b)