MAC хаяг солигдсон үед CentOS, Redhat системд хийх тохиргоо хуудсын эх сурвалжийг харах

<p style="text-align: justify">I was playing with My Virtualbox today and i tried to clone some Centos Servers. But after this, when starting the eth0, it is no more available.</p><p style="text-align: justify"><strong>check network:</strong></p><pre># ifconfig</pre><pre>lo&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Link encap:Local Loopback
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; inet addr:127.0.0.1&nbsp; Mask:255.0.0.0
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; inet6 addr: ::1/128 Scope:Host
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; UP LOOPBACK RUNNING&nbsp; MTU:16436&nbsp; Metric:1
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; RX packets:0 errors:0 dropped:0 overruns:0 frame:0
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; collisions:0 txqueuelen:0
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; RX bytes:0 (0.0 b)&nbsp; TX bytes:0 (0.0 b)</pre><p style="text-align: justify"><strong>&nbsp;Try to start Eth0 device</strong></p><pre># ifup eth0
Device eth0 does not seem to be present, delaying initialisation</pre><p style="text-align: justify"><strong>To Solve this :</strong></p><p style="text-align: justify">Delete networking interface rules file so that it can be regenerated and reboot your CentOS system.</p><pre># rm /etc/udev/rules.d/70-persistent-net.rules
# reboot</pre><p style="text-align: justify"><strong>New Mac address has been generated:</strong></p><pre># 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 0x8086:0x100e (e1000)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<span style="color: #ff0000">08:00:27:fe:c1:03</span>", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"</pre><p style="text-align: justify">Now edit <strong>/etc/sysconfig/network-scripts/ifcfg-eth0</strong>,</p><pre>Add&nbsp;&nbsp; new&nbsp; HWADDR generated or&nbsp; remove it 
Remove UUID&nbsp;&nbsp; line</pre><p style="text-align: justify"><strong>Restart the networking service</strong></p><pre># service network restart
Shutting down interface eth0:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [&nbsp; OK&nbsp; ]
Shutting down loopback interface:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [&nbsp; OK&nbsp; ]
Bringing up loopback interface:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [&nbsp; OK&nbsp; ]
Bringing up interface eth0:&nbsp; Determining if ip address 192.168.1.99 is already in use for device eth0...
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [&nbsp; OK&nbsp; ]</pre><pre># ifconfig
eth0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Link encap:Ethernet&nbsp; HWaddr 08:00:27:FE:C1:03
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; inet addr:192.168.1.99&nbsp; Bcast:xxxxxxxx&nbsp; Mask:255.255.255.0
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; inet6 addr: fe80::a00:27ff:fefe:c103/64 Scope:Link
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; UP BROADCAST RUNNING MULTICAST&nbsp; MTU:1500&nbsp; Metric:1
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; RX packets:4400 errors:0 dropped:0 overruns:0 frame:0
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; TX packets:129 errors:0 dropped:0 overruns:0 carrier:0
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; collisions:0 txqueuelen:1000
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; RX bytes:387597 (378.5 KiB)&nbsp; TX bytes:19567 (19.1 KiB)</pre><p style="text-align: justify">Enjoy!</p>


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