问题描述：ubuntu服务器为单网卡，设备名称为eth0，插入一块网卡后，增加新的网卡设备eth1，后来由于某种原因更换了第二换网卡，重启以后，网卡设置为eth0和eht2，想将网卡设备eth2改为eth1。

解决方法：终端输入：vi /etc/udev/rules.d/70-persistent-net.rules

出现以下文件

# This file was automatically generated by the /lib/udev/write_net_rules
# program, run by the persistent-net-generator.rules rules file.
#
# You can modify it, as long as you keep each rule on a single
# line, and change only the value of the NAME= key.

# PCI device 0x8086:0x10de (e1000e)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:25:65:b5:82:ca", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

# PCI device 0x8086:0x100e (e1000)
#SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0d:0c:69:af:b8", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

# PCI device 0x8086:0x100e (e1000)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0e:01:2c:09:9c", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

修改相对的设备名称，保存退出，重启网卡服务