當我們使用centos7時網卡名子過長，我們需要更改成自己想要的名字，過程如下：
1、備份並修改/etc/default/grub
[root@controller03 ~]# cp /etc/default/grub /etc/default/grub.bk
2、 let's disable the predictable naming rule. For that, you can pass "net.ifnames=0" kernel parameter during boot. This is achieved by editing /etc/default/grub and adding "net.ifnames=0" to GRUB_CMDLINE_LINUX variable
[root@controller03 ~]# cat /etc/default/grub GRUB_TIMEOUT=5 GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)" GRUB_DEFAULT=saved GRUB_DISABLE_SUBMENU=true GRUB_TERMINAL_OUTPUT="console" GRUB_CMDLINE_LINUX="crashkernel=auto rd.lvm.lv=root_vg01/lv_01 net.ifnames=0 rhgb quiet" GRUB_DISABLE_RECOVERY="true"
3、run this command to regenerate GRUB configuration with updated kernel parameters
[root@controller03 ~]# cp /boot/grub2/grub.cfg /boot/grub2/grub.cfg.bk [root@controller03 ~]# sudo grub2-mkconfig -o /boot/grub2/grub.cfg
4、修改 vim /etc/udev/rules.d/70-persistent-net.rules 根據MAC對應 自己想要定義的網卡的名字
[root@controller03 ~]# cat /etc/udev/rules.d/70-persistent-net.rules
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*",ATTR{address}=="52:54:00:57:1a:ef", ATTR{type}=="1", KERNEL=="eth*",NAME="ens4"
#SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*",ATTR{address}=="52:54:00:37:dc:e0", ATTR{type}=="1", KERNEL=="eth*",NAME="eth1"5、最後重啓系統即可！
參考鏈接
http://ask.xmodulo.com/change-network-interface-name-centos7.html