Talking about the problem that Linux virtual machine can't recognize network card and can't surf the internet

The phenomenon that occurs:

[Email protected] net]# ifconfig

Lo Link encap:local Loopback

inet addr:127.0.0.1 mask:255.0.0.0

Inet6 addr::: 1/128 scope:host

Up LOOPBACK RUNNING mtu:16436 metric:1

RX packets:4 errors:0 dropped:0 overruns:0 frame:0

TX packets:4 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:0

RX bytes:252 (252.0 b) TX bytes:252 (252.0 b)

1. The first thing to do is to set up the virtual machine as a bridging mode, so that the virtual machine can share the network to surf the Internet and stop the virtual device in the real machine, set the method: Control Panel----Change the adapter settings----Disable the device that starts with "V", and if there is still no IP, proceed as follows.

2. In the virtual machine to view the current MAC address, such as:00:0c:29:1c:48:30 , this Mac is the Mac you want to load, normally eth0, but not necessarily eth0, if not a graphical interface, you can use the command to view

#查看网卡是否加载驱动, if there is no driver, additional driver installation is required

[Email protected] eth3]# DMESG |grep-i eth

e1000 0000:02:01.0:eth0: (pci:66mhz:32-bit) 00:0c:29:1c:48:30

e1000 0000:02:01.0:eth0:intel (R) pro/1000 Network Connection

e1000 0000:02:04.0:eth1: (pci:66mhz:32-bit) 00:0c:29:1c:48:3a

e1000 0000:02:04.0:eth1:intel (R) pro/1000 Network Connection

Udev:renamed network interface eth0 to Eth3

Udev:renamed network interface eth1 to Eth4

E1000:eth3 NIC Link is up to + Mbps full Duplex, Flow Control:none

Eth3:no IPV6 Routers present

#从以上信息可以看出eth3正在工作, you need to modify the ETH0 network card configuration information, corresponding to Eth3

#进入目录查看mac对应的是eth几

[Email protected] ~]# cd/sys/class/net

[[email protected] net]# ls

Eth3 Lo

#注意这里是eth几, the configuration file to be modified later is the ETH

[Email protected] net]# CD eth3/

[[email protected] eth3]# ls

Address

[email protected] eth3]# cat Address

00:0c:29:1c:48:30 #这个mac地址就是真正的mac地址

3. Modify the NIC configuration information

#修改ifcfg-eth0

[Email protected] ~]# cd/etc/sysconfig/network-scripts/

[[email protected] network-scripts]# ls

Ifcfg-eth0

#注意, there may be eth1 or eth2, etc., just modify one, the remainder of the ETH config file is deleted,

#注意, Ifcfg-lo and the rest of the directories cannot be deleted

#先把eth0更名为eth3 (/sys/class/net is a few of the ETH, just write the ETH)

[Email protected] network-scripts]# mv Ifcfg-eth0 ifcfg-eth3

#查看信息

[email protected] network-scripts]# cat Ifcfg-eth3

Device=eth0

Bootproto=dhcp

Hwaddr=00:0c:29:fa:ed:77

Ipv6init=yes

Nm_controlled=yes

Onboot=no

Type=ethernet

Uuid= "Dde10f3b-43be-4016-85fd-215aedf35a70"

Userctl=no

dns1=202.106.0.20

Peerdns=yes

#修改如下

[Email protected] network-scripts]# VI ifcfg-eth0

#删除HWADDR和UUID

#把ONBOOT值改成yes

#DEVICE的值根据/sys/class/net is the ETH, just write ETH.

Device=eth3

Bootproto=dhcp

Ipv6init=yes

Nm_controlled=yes

Onboot=yes

Type=ethernet

Userctl=no

dns1=202.106.0.20

Peerdns=yes

#保存退出

#修改70-persistent-net.rules

[Email protected] network-scripts]# cd/etc/udev/rules.d/

[[email protected] rules.d]# ls

60-raw.rules 70-persistent-cd.rules 70-persistent-net.rules

#编辑

[Email protected] rules.d]# VI 70-persistent-net.rules

# PCI Device 0x8086:0x100f (e1000)

subsystem== "NET", action== "Add", drivers== "? *", attr{address}=="00:0c:29:1c:48:30", attr{type}== "1", kernel== "eth*", name= "Eth3 "

#注意, remove the redundant PCI device configuration information, leave the same line as the MAC address, and change the name

4. Restart the service

[Email protected] rules.d]# Service Network Restart

Determining IP information for eth3 ... done.

#当你看到都ok的时候, Congratulations, IP is there!

#如果没有成功, please re-check the above steps, must be misconfigured, be sure to pay attention to the corresponding relationship between Mac and ETH.

#如笔者之前的eth0的mac地址是00:0c:29:1c:48:30, and Eth1 's MAC address is 00:0c:29:1c:48:3a, only one bit, so be sure to check carefully.

Talking about the problem that Linux virtual machine can't recognize network card and can't surf the internet