Linux on CentOS X is network problems after moving and copying solution must

Check out a lot of information, concluded under:

Use switch user: su root, and then enter the password

Network card configuration (note: ifcfg-eth0,70-persistent-net.rules Network Connections and configuration as to three MAC Address)

vim /etc/sysconfig/network-scripts/ifcfg-eth0

####################################

DEVICE="eth0"

BOOTPROTO="static"

HWADDR="00:50:56:33:48:99"

IPV6INIT="no"

NM_CONTROLLED="yes"

ONBOOT="yes"

TYPE="Ethernet"

UUID="366c5030-b1bd-4af5-9f37-847c37f0cd38"

IPADDR=192.168.1.103

NETMASK=255.255.255.0

GETWAY=192.168.1.1

DNS1=8.8.8.8

vim /etc/sysconfig/network

####################################

NETWORKING=yes

HOSTNAME=localhost.localdemain

GATEWAY=192.168.1.1

vim /etc/resolv.conf

####################################

nameserver 8.8.8.8

Restart card

service network restart

解决 Error:No suitable device found: no device found for connection "System eth0"

Reproduced

Solve problems using clone VMware virtual machine can not be out of the new networking

One. background

We installed a virtual machine, I want to do a distributed cluster, want to simulate several servers, then wanted to direct copying already have installed a virtual machine, so relatively easy, do not repeat the install and configure the JAVA virtual machine environment, save to do the same thing, then copied directly, so before you configure the JAVA environment have been.

Issues relating to the

Then I copied a good virtual machine, start landing into account (with a username and password before that stage is the same), modify the good IPADDR, and then restart the network card problems?

#service network restart

Problems: Error: No suitable device found: no device found for connection "System eth0" as shown:

#ifup eth0

Appear: eth0: unknown interface: the question No such device, the card will not start problems.

III. To solve the problem

The first step: we click on the Network Adapter Remove to delete the network card interface, as shown:

Step two : then add a new card, it is to click add, this time in front of a table with MAC Address is not the same, as shown in Figure

The third step: restart the virtual machine, and then enter the directory /etc/udev/rules.d/

#cat 70-persistent-net.rules

The information inside our address with MAC Address Network Adapter like, as shown:

Step four: enter / etc / sysconfig / network-scripts / directory

#vi ifcfg-eth0

HWADDR, like the modified MAC Address Network Adapter's address, as shown:

Step five : Restart card, this time can be started normally, as shown:

70-persistent-net.rules not automatically generated, solutions

Not automatically generate 70-persistent-net.rules reason of file:　　

　　Replacing linux modify the kernel before ifcfg-eth0 file, replace the kernel, use dhclient not allocate dynamic IP , delete the 70-persistent-net.rules file, restart the system.