实验说明：
实验环境：
实验步骤：
1.查看当前网卡设备数目及名称
[root@localhost ~]$ ls -l /etc/sysconfig/network-scripts | awk '/ifcfg-e/ {print $9}'
ifcfg-enp0s10
ifcfg-enp0s3
ifcfg-enp0s8
ifcfg-enp0s9
2.备份系统默认网卡配置文件
[root@localhost ~]$ cd /etc/sysconfig/network-scripts/
[root@localhost network-scripts]$ nic_list=`ls -l /etc/sysconfig/network-scripts|awk '/ifcfg-e/ {print $9}'`
[root@localhost network-scripts]$ for nic_name in $nic_list; do
> cp $nic_name $nic_name.bak; done
3.重命名网卡配置文件名
[root@localhost network-scripts]$ i=0
[root@localhost network-scripts]$ nic_list=`ls -l /etc/sysconfig/network-scripts|awk '/ifcfg-e/ {print $9}'`
[root@localhost network-scripts]$ for nic_name in $nic_list; do
> mv $nic_name ifcfg-eth${i};
> i=$(expr $i + 1);
> done
4.修改网卡配置文件
[root@localhost network-scripts]$ for new_nic_name in $new_nic_list; do
> name=$(echo $new_nic_name|cut -b 7-);
> sed -i "s/NAME=.*/NAME=$name/g" $new_nic_name;
> sed -i "s/DEVICE=.*/DEVICE=$name/g" $new_nic_name;
> sed -i 's/ONBOOT=no/ONBOOT=yes/g' $new_nic_name
> done
5.修改/etc/default/grub文件，禁用biosdevname程序
[root@localhost network-scripts]$ sed -i '/GRUB_CMDLINE_LINUX=/d' /etc/default/grub
[root@localhost network-scripts]$ echo 'GRUB_CMDLINE_LINUX="rd.lvm.lv=centos/root \
> rd.lvm.lv=centos/swap crashkernel=auto \
> net.ifnames=0 biosdevname=0 rhgb quiet"' \
> >> /etc/default/grub
6.重新生成GRUB配置并更新内核参数
[root@localhost network-scripts]$ grub2-mkconfig -o /boot/grub2/grub.cfg
7.重启
[root@localhost ~]$ reboot now
8.查询网卡信息
[root@localhost ~]$ ip a | grep eth[0-9]
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
inet 192.168.56.114/24 brd 192.168.56.255 scope global dynamic eth0
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
inet 192.168.56.115/24 brd 192.168.56.255 scope global dynamic eth1
4: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
inet 192.168.56.116/24 brd 192.168.56.255 scope global dynamic eth2
5: eth3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
inet 192.168.56.117/24 brd 192.168.56.255 scope global dynamic eth3
PS：CentOS7 修改默认网卡名称脚本 (change_default_nic_name.sh)，直接拷贝就可使用。
#!/usr/bin/bash
#this script will change default ifcfg-enoxxxx/ifcfg-enpxxxx to ifcfg-ethx
ls -l /etc/sysconfig/network-scripts|awk '/ifcfg-eno[0-9]*/ {print $9}' > default_nic_name.txt
i=0
cat default_nic_name.txt| while read line
do
cd /etc/sysconfig/network-scripts
name=$(echo $line|cut -b 7-)
cp $line ${line}.bak
sed -i "s/$name/eth${i}/g" $line
sed -i 's/ONBOOT=no/ONBOOT=yes/g' $line
mv $line ifcfg-eth${i}
i=$(expr $i + 1)
16 done
sed -i '/GRUB_CMDLINE_LINUX=/d' /etc/default/grub
echo 'GRUB_CMDLINE_LINUX="rd.lvm.lv=centos/root rd.lvm.lv=centos/swap crashkernel=auto net.ifnames=0 biosdevname=0 rhgb quiet"' >> /etc/default/grub
grub2-mkconfig -o /boot/grub2/grub.cfg
reboot