CentOS 7 更改網卡名到以前的eth0

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      最近安裝了CentOS7，核心總算升級到3.10,支援Linux容器，network namespace·······

      但是安裝完之後，發現ifconfig沒看到熟悉的eth0，卻是enp0s3，雖然只是一個網卡代號，但明顯會影響一些指令碼，帶來諸多不方便，也不知道CentOS為何設定成這樣。於是想把他改回來。

[[email protected] fbw]# ifconfig enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.0.2.5 netmask 255.255.255.0 broadcast 10.0.2.255 inet6 fe80::a00:27ff:fe80:4d3c prefixlen 64 scopeid 0x20<link> ether 08:00:27:80:4d:3c txqueuelen 1000 (Ethernet) RX packets 2134 bytes 176901 (172.7 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 1504 bytes 206316 (201.4 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 0 (Local Loopback) RX packets 538 bytes 46716 (45.6 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 538 bytes 46716 (45.6 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

 

  於是參考之前的一篇日誌 Centos 配置eth0 提示Device does not seem to be present ，先去將ifcfg-enp0s3重新命名為ifcfg-eth0，然後去查看/etc/udev/rules.d/70-persistent-net.rules檔案，居然發現CentOS7裡面沒有這個檔案，看來之前刪除這個重啟的方法不奏效了。

   先百度一下，找到了一篇《 Centos Linux系統安裝後網卡em改回eth的兩種方法》，看了其中的第二個方法，改了一下grub的引導檔案，重啟一下，發現還是沒有改名。

   後google了一下，找到了一篇《Change default network name to old “eth0″ on RHEL 7 / Fedora 19 above》，也是改了一下grub檔案，重啟之後成功解決！！！

 

具體步驟如下：

   1、 vim /etc/default/grub 

GRUB_TIMEOUT=5GRUB_DISTRIBUTOR=”$(sed ‘s, release .*$,,g’ /etc/system-release)”GRUB_DEFAULT=savedGRUB_DISABLE_SUBMENU=trueGRUB_TERMINAL_OUTPUT=”console”GRUB_CMDLINE_LINUX=”rd.lvm.lv=rootvg/usrlv rd.lvm.lv=rootvg/swaplv crashkernel=auto vconsole.keymap=us rd.lvm.lv=rootvg/rootlv vconsole.font=latarcyrheb-sun16 rhgb quiet”GRUB_DISABLE_RECOVERY=”true”

 

    在GRUB_CMDLINE_LINUX的最後，加上 net.ifnames=0 biosdevname=0 的參數

GRUB_CMDLINE_LINUX=”rd.lvm.lv=rootvg/usrlv rd.lvm.lv=rootvg/swaplv crashkernel=auto vconsole.keymap=us rd.lvm.lv=rootvg/rootlv vconsole.font=latarcyrheb-sun16 rhgb quiet net.ifnames=0 biosdevname=0”

 

  2. mv /etc/sysconfig/network-scripts/ifcfg-enp0s3  /etc/sysconfig/network-scripts/ifcfg-eth0 

  3、reboot

 

  最後成功將網卡重名為eth0，嗯~~，還是那個味道，還是那麼親切~~~

[[email protected] ~]$ ifconfig eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.0.2.5 netmask 255.255.255.0 broadcast 10.0.2.255 inet6 fe80::a00:27ff:fe80:4d3c prefixlen 64 scopeid 0x20<link> ether 08:00:27:80:4d:3c txqueuelen 1000 (Ethernet) RX packets 56 bytes 7959 (7.7 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 70 bytes 10796 (10.5 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 0 (Local Loopback) RX packets 5 bytes 580 (580.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 5 bytes 580 (580.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0