centos7修改网卡名字为传统名字

前言：在centos6及其之前的系统中，我们已经习惯了网卡为eth0,eht1这种网卡命名方式，在centos7上网卡名字为ens33,ens37,ens38等名字，很别扭，想统一下网卡的命名。

1 修改内核配置文件

[root@centos74 ~]$ sed -r -i.bak '/^GRUB_CMDLINE_LINUX/s@(.*)"@\1 net.ifnames=0 biosdevname=0"@' /etc/default/grub               # 修改下grub的配置文件   -i.bak保留原始文件的备份为.bak文件
[root@centos74 ~]$ cp /boot/grub2/grub.cfg /boot/grub2/grub.cfg.bak                                                              # 备份配置文件
[root@centos74 ~]$ grub2-mkconfig -o /boot/grub2/grub.cfg                                                                         # grub2-mkconfig 生成配置文件
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-063d6d8599b74e68adab2b5e6cc3add8
Found initrd image: /boot/initramfs-0-rescue-063d6d8599b74e68adab2b5e6cc3add8.img
done

2 修改已有的网卡信息

[root@centos74 network-scripts]$ mv ifcfg-ens33 ifcfg-eth0                                                             # 已有网卡的重命名，我这里只有ens33有配置，只做这个网卡的处理
[root@centos74 network-scripts]$ sed -ri 's@ens33@eth0@' ifcfg-eth0                                                    # 替换ens33为eth0
[root@centos74 network-scripts]$ cat ifcfg-eth0                                                                        # 检查下
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
UUID=f20778dd-bdaa-4e5c-8e2a-8fef4ec151a0
DEVICE=eth0
ONBOOT=yes

3 重启检查

重启

[root@centos74 ~]$ reboot                                                                                    # 重启系统

 检查下

[root@centos74 ~]$ ip a                                                                                       # 检查
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
    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:ad:b0:f2 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.105/24 brd 192.168.1.255 scope global dynamic eth0
       valid_lft 172502sec preferred_lft 172502sec
    inet6 fe80::424f:3b52:2ac8:2535/64 scope link 
       valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:ad:b0:fc brd ff:ff:ff:ff:ff:ff
    inet 192.168.27.141/24 brd 192.168.27.255 scope global dynamic eth1
       valid_lft 1503sec preferred_lft 1503sec
    inet6 fe80::25f5:cc0c:6e2a:d1b2/64 scope link 
       valid_lft forever preferred_lft forever
4: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:ad:b0:06 brd ff:ff:ff:ff:ff:ff
    inet 192.168.27.142/24 brd 192.168.27.255 scope global dynamic eth2
       valid_lft 1503sec preferred_lft 1503sec
    inet6 fe80::7046:9827:fa73:db4c/64 scope link 
       valid_lft forever preferred_lft forever
5: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000
    link/ether 52:54:00:3f:39:3a brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
6: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
    link/ether 52:54:00:3f:39:3a brd ff:ff:ff:ff:ff:ff
7: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN 
    link/ether 02:42:ba:6e:03:4f brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 scope global docker0
       valid_lft forever preferred_lft forever