Centos7更改默认网卡为eth

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1.更改默认网卡为eth0
vi /etc/sysconfig/network-scripts/ifcfg-eno16777736

#首先，先编辑网卡的配置文件, 将里面的NAME项修改为eth0
mv /etc/sysconfig/network-scripts/ifcfg-eno16777736 /etc/sysconfig/network-scripts/ifcfg-eth0
#然后，重命名该文件

2.编辑Grub配置

vim /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=centos/root rd.lvm.lv=centos/swap net.ifnames=0 biosdevname=0 rhgb quiet"
GRUB_DISABLE_RECOVERY="true"
#禁用该可预测命名规则。在启动时传递“net.ifnames=0 biosdevname=0 ”的内核参数。通过编辑/etc/default/grub并加入“net.ifnames=0 biosdevname=0 ”到GRUBCMDLINELINUX变量来实现的。

grub2-mkconfig -o /boot/grub2/grub.cfg

#重新生成GRUB配置并更新内核参数

3.设置设备名规则

vim /etc/udev/rules.d/70-persistent-net.rules
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:84:3a:14", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
#根据Centos 官方WIKI的FAQ中得知，如果你有多个接口，并且想要控制其设备名，而不是让内核以它自己的方式命名，创建,/etc/udev/rules.d/XXX-net.rules规则是必要的

#重启后，O了
[iyunv@localhost ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:5b:71:b3 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.205/24 brd 192.168.1.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe5b:71b3/64 scope link