Centos 7 Linux系统修改网卡名称为ethx

方法一    Centos7 系统安装完成后更改网卡名称方法

1、查看Centos7系统默认的网卡配置（eno16777736）

[root@server ~]# ifconfig
eno16777736: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500  #系统默认的网卡名称
        inet 172.16.0.2  netmask 255.255.0.0  broadcast 172.16.255.255
        inet6 fe80::20c:29ff:fefa:dbfa  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:fa:db:fa  txqueuelen 1000  (Ethernet)
        RX packets 6699  bytes 8261881 (7.8 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3006  bytes 215704 (210.6 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 0  (Local Loopback)
        RX packets 25200  bytes 1468912 (1.4 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 25200  bytes 1468912 (1.4 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
[root@server ~]#

2、编辑centos7系统默认的网卡配置文件，将NAME、DEVICE选项修改为eth0

[root@server ~]# vi /etc/sysconfig/network-scripts/ifcfg-eno16777736
TYPE=Ethernet
BOOTPROTO=none
TYPE=Ethernet
BOOTPROTO=none
TYPE=Ethernet
BOOTPROTO=none
DEFROUTE=yes
IPV4_FAILURE_FATAL=yes
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
NAME=eno16777736        此处修改为#NAME=eth0
UUID=68062773-e078-4f64-8df6-3cbdf4730a4b
DEVICE=eno16777736      此处修改为#DEVICE=eth0
ONBOOT=yes
DNS1=192.168.1.1
DNS2=114.114.114.114
IPADDR=172.16.0.2
PREFIX=16
IPADDR1=172.16.0.4
PREFIX1=16
IPADDR2=172.16.0.5
PREFIX2=16
GATEWAY=172.16.0.1

3、将Centos7系统网卡配置文件ifcfg-eno16777736重命名为ifcfg-eth0

[root@server ~]# mv /etc/sysconfig/network-scripts/ifcfg-eno16777736 /etc/sysconfig/network-scripts/ifcfg-eth0

4、更改/etc/default/grub启动菜单传递给内核的参数，在GRUB_CMDLINE_LINUX变量中加入“net.ifnames=0 biosdevname=0”

[root@server ~]# ls -ld /etc/sysconfig/grub
lrwxrwxrwx. 1 root root 17 Aug 26  2017 /etc/sysconfig/grub -> /etc/default/grub
[root@server ~]# 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  net.ifnames=0 biosdevname=0 rhgb quiet"  #添加GRUB_CMDLINE_LINUX变量net.ifnames=0 biosdevname=0
GRUB_DISABLE_RECOVERY="true"

5、运行grub2-mkconfig -o /boot/grub2/grub.cfg命令重新生成grub菜单并更新内核参数

[root@server ~]# grub2-mkconfig -o /boot/grub2/grub.cfg
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-3.10.0-327.el7.x86_64
Found initrd image: /boot/initramfs-3.10.0-327.el7.x86_64.img
Found linux image: /boot/vmlinuz-0-rescue-f818c03720a04698929d06982f96d567
Found initrd image: /boot/initramfs-0-rescue-f818c03720a04698929d06982f96d567.img
done

6、修改/etc/udev/rules.d/90-eno-fix.rules配置文件，将NAME=" eno16777736"修改为NAME="eth0"

[root@server ~]# cat /etc/udev/rules.d/90-eno-fix.rules
# This file was automatically generated on systemd update
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:fa:db:fa", NAME=" eno16777736"
[root@server ~]# sed -i 's#NAME="eno16777736"#NAME="eth0"#g' /etc/udev/rules.d/90-eno-fix.rules
[root@server ~]# cat /etc/udev/rules.d/90-eno-fix.rules
# This file was automatically generated on systemd update
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:fa:db:fa", NAME="eth0"  #修改NAME变量为eth0

7、重启Centos7系统，完成网卡改名

[root@server ~]# reboot

8、验证Centos7系统网卡改名的结果

[root@server ~]# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500  #查看系统网卡名称已经设置为eth0
        inet 172.16.0.2  netmask 255.255.0.0  broadcast 172.16.255.255
        inet6 fe80::20c:29ff:fefa:dbfa  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:fa:db:fa  txqueuelen 1000  (Ethernet)
        RX packets 339  bytes 28141 (27.4 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 190  bytes 25047 (24.4 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 0  (Local Loopback)
        RX packets 8034  bytes 469008 (458.0 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 8034  bytes 469008 (458.0 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
[root@server ~]#

方法二    Centos7 系统安装开始时更改网卡名称方法

1、将光标移动到选择”Install CentOS 7”

2、选择Tab键，打开Kernel启动项，再后面添加net.ifnames=0 biosdevname=0

3、按Enter键，进入安装操作系统

4、启动操作系统后，查看系统网卡名称

[root@localhost ~]# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.16.0.2  netmask 255.255.0.0  broadcast 172.16.255.255
        inet6 fe80::20c:29ff:fefa:dbfa  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:fa:db:fa  txqueuelen 1000  (Ethernet)
        RX packets 30  bytes 3660 (3.5 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 22  bytes 2078 (2.0 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.16.0.101  netmask 255.255.255.0  broadcast 172.16.0.255
        inet6 fe80::20c:29ff:fefa:db04  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:fa:db:04  txqueuelen 1000  (Ethernet)
        RX packets 204  bytes 18958 (18.5 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 140  bytes 20300 (19.8 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 0  (Local Loopback)
        RX packets 387  bytes 22683 (22.1 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 387  bytes 22683 (22.1 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@localhost ~]#