CentOS7.4 系统安装好后，默认网卡名称为为ensXX，如ens33，如果要修改为eth0开头，需要进行如下配置
1.查看原网卡名称：
[root@centos7 network-scripts]# ifconfig
ens33: flags=4163
inet 192.168.155.104 netmask 255.255.255.0 broadcast 192.168.155.255
inet6 fe80::212a:c0fb:e179:7f1c prefixlen 64 scopeid 0x20
ether 00:0c:29:c4:34:bd txqueuelen 1000 (Ethernet)
RX packets 1465 bytes 129004 (125.9 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 802 bytes 104240 (101.7 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10
loop txqueuelen 1 (Local Loopback)
RX packets 72 bytes 5720 (5.5 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 72 bytes 5720 (5.5 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
virbr0: flags=4099
inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255
ether 52:54:00:1a:02:e7 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@centos7 network-scripts]#
2.修改网卡信息
[root@centos7 ~]# cd /etc/sysconfig/network-scripts/
[root@centos7 network-scripts]# vi ifcfg-ens33
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=dhcp
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=eth0 #name修改为eth0
UUID=048802a8-f20c-4c19-902a-e326b3a69686
#DEVICE=ens33
ONBOOT=yes
网卡配置文件名称改为 ifcfg-eth0
[root@centos7 network-scripts]# mv ifcfg-ens33 ifcfg-eth0
3.修改grub配置
因 CentOS7 采用 grub2 引导，还需要对 grub2 进行修改，编辑 /etc/default/grub 配置文件，在 GRUB_CMDLINE_LINUX 这个参数后面加入 "net.ifnames=0 biosdevname=0"
[root@centos7 network-scripts]# vi /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 rhgb quiet net.ifnames=0 biosdevname=0"
GRUB_DISABLE_RECOVERY="true"
用 grub2-mkconfig 命令重新生成GRUB配置并更新内核
[root@centos7 network-scripts]# grub2-mkconfig -o /boot/grub2/grub.cfg
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-3.10.0-693.el7.x86_64
Found initrd image: /boot/initramfs-3.10.0-693.el7.x86_64.img
Found linux image: /boot/vmlinuz-0-rescue-c15c0efab776454daa1c4da36ec768f6
Found initrd image: /boot/initramfs-0-rescue-c15c0efab776454daa1c4da36ec768f6.img
done
[root@centos7 network-scripts]#
重启系统
[root@centos7 network-scripts]# reboot
4.验证网卡名
重启之后验证网卡名称:
[root@centos7 ~]# ifconfig
eth0: flags=4163
inet 192.168.155.104 netmask 255.255.255.0 broadcast 192.168.155.255
inet6 fe80::8453:5a1:debb:b9d5 prefixlen 64 scopeid 0x20
ether 00:0c:29:c4:34:bd txqueuelen 1000 (Ethernet)
RX packets 119 bytes 12471 (12.1 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 142 bytes 18721 (18.2 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10
loop txqueuelen 1 (Local Loopback)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@centos7 ~]#