centos7-修改网卡名称

Posted on Edited on In

需求

今天测试了一下centos7，发现centos7的网卡名的后缀变成随机的了。
以前写的基于eth0和eth1的脚本已经不能用了，为了我的脚本，我只能把centos7的网卡命名规则改回来了。

实战过程

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cd /etc/sysconfig/network-scripts/
mv ifcfg-eno1* ifcfg-eth0
mv ifcfg-eno3* ifcfg-eth1

重写网卡的配置文件

快速修改etho0网卡配置文件

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cat >ifcfg-eth0<<EOF
DEVICE=eth0
ONBOOT=yes
BOOTPROTO=dhcp
DNS=8.8.8.8
EOF

快速修改etho1网卡配置文件

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cat >ifcfg-eth1<<EOF
DEVICE=eth1
ONBOOT=yes
BOOTPROTO=static
IPADDR=10.0.2.192
NETWORK=255.255.255.0
EOF

备份grub配置文件，方便回滚

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cp /etc/default/grub /etc/default/grub_`date +%F`
vim /etc/sysconfig/grub
GRUB_CMDLINE_LINUX="net.ifnames=0 biosdevname=0 rhgb quiet"

生成新的配置文件

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

关闭多余的开机启动项

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systemctl list-unit-files |grep enabled |awk '{print $1}' |egrep -v "sshd.service|rsyslog.service|crond.service"| sed -rn 's#(.*)#systemctl disable \1 #gp' |bash

重启系统

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reboot

重启后登录系统查看IP地址已经修改成功

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ip addr

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 00:50:56:39:b1:45 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.128/24 brd 192.168.0.255 scope global dynamic eth0
       valid_lft 1122sec preferred_lft 1122sec
    inet6 fe80::250:56ff:fe39:b145/64 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 00:50:56:36:b7:0a brd ff:ff:ff:ff:ff:ff
    inet 192.168.2.169/24 brd 192.168.2.255 scope global dynamic eth1
       valid_lft 1721sec preferred_lft 1721sec
    inet6 fe80::250:56ff:fe36:b70a/64 scope link
       valid_lft forever preferred_lft forever