Linux修改网卡名称

查看当前系统版本

[root@localhost ~]# cat /etc/centos-release
CentOS Linux release 7.5.1804 (Core) 

查看当前网卡信息

[root@localhost ~]# ifconfig | head -2 
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.200  netmask 255.255.255.0  broadcast 192.168.1.255

可以看到网卡名为ens33。

为了方便管理和使用改为以“eth”开头的网卡名。

修改配置文件

• 修改前

[root@localhost ~]# cat -n /etc/default/grub
     1	GRUB_TIMEOUT=5
     2	GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
     3	GRUB_DEFAULT=saved
     4	GRUB_DISABLE_SUBMENU=true
     5	GRUB_TERMINAL_OUTPUT="console"
     6	GRUB_CMDLINE_LINUX="crashkernel=auto rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rhgb quiet"
     7	GRUB_DISABLE_RECOVERY="true"

• 修改后

  ​ 在第六行的末尾添加 net.ifnames=0 biosdevname=0

[root@localhost ~]# cat -n /etc/default/grub
     1	GRUB_TIMEOUT=5
     2	GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
     3	GRUB_DEFAULT=saved
     4	GRUB_DISABLE_SUBMENU=true
     5	GRUB_TERMINAL_OUTPUT="console"
     6	GRUB_CMDLINE_LINUX="crashkernel=auto rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rhgb quiet net.ifnames=0 biosdevname=0"
     7	GRUB_DISABLE_RECOVERY="true"

• 重新生成grub,然后重启

[root@localhost ~]# grub2-mkconfig -o /boot/grub2/grub.cfg
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-3.10.0-862.el7.x86_64
Found initrd image: /boot/initramfs-3.10.0-862.el7.x86_64.img
Found linux image: /boot/vmlinuz-0-rescue-e7698cd933f74608881ae839d102df88
Found initrd image: /boot/initramfs-0-rescue-e7698cd933f74608881ae839d102df88.img
done

修改网卡名称

[root@localhost ~]# nmcli connection show
NAME                UUID                                  TYPE      DEVICE 
Wired connection 1  f8dd63e3-2724-3dc4-b0c4-03976af2a979  ethernet  eth0   
ens33               8c191747-33ba-449b-b52a-04c0627281ab  ethernet  --     

[root@localhost ~]# nmcli connection delete ens33		//删除原有的错误网卡
[root@localhost ~]# nmcli connection delete Wired\ connection\ 1	
    
    
[root@localhost ~]# nmcli connection show
[root@localhost ~]# nmcli connection add type ethernet  ifname eth0 con-name eth0

[root@localhost ~]# nmcli connection show
[root@localhost ~]# nmcli connection modify eth0 ipv4.method manual ipv4.addresses 192.168.1.200/24 autoconnect yes
[root@localhost ~]# nmcli connection up eth0
[root@localhost ~]# ifconfig |head -2
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.200  netmask 255.255.255.0  broadcast 192.168.1.255