เปลี่ยนชื่อการ์ดแลน eth 

sudo nano /etc/udev/rules.d/70-persistent-net.rules

# 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 0x10ec:0x8168 (r8169)

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="10:78:d2:81:a4:0a", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

# PCI device 0x8086:0x1010 (e1000)

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:02:a5:4f:06:52", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

# PCI device 0x8086:0x1010 (e1000)

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:02:a5:4f:06:53", ATTR{type}=="1", KERNEL=="eth*", NAME="eth2"

# PCI device 0x8086:0x1010 (e1000)

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:02:a5:4e:f6:12", ATTR{type}=="1", KERNEL=="eth*", NAME="eth5"

# PCI device 0x8086:0x1010 (e1000)

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:02:a5:4e:f6:13", ATTR{type}=="1", KERNEL=="eth*", NAME="eth6"

# PCI device 0x8086:0x1010 (e1000)

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:02:a5:4f:02:40", ATTR{type}=="1", KERNEL=="eth*", NAME="eth3"

# PCI device 0x8086:0x1010 (e1000)

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:02:a5:4f:02:41", ATTR{type}=="1", KERNEL=="eth*", NAME="eth4" 
See also: https://help.ubuntu.com/10.04/serverguide/C/network-configuration.html