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 -ir ‘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
