問題描述：ubuntu服務器為單網卡，設備名稱為eth0，插入一塊網卡后，增加新的網卡設備eth1，后來由于某種原因更換了第二換網卡，重啟以后，網卡設置為eth0和eht2，想將網卡設備eth2改為eth1。

解決方法：終端輸入：vi /etc/udev/rules.d/70-persistent-net.rules

出現以下文件

# 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"

修改相對的設備名稱，保存退出，重啟網卡服務