1. 使用命令修改网卡名

cd /etc/sysconfig/network-scripts/
mv ifcfg-ens33 ifcfg-eth0
mv ifcfg-ens34 ifcfg-eth1

2. 修改网卡内容

cat > ifcfg-eth0<<END
TYPE=Ethernet
BOOTPROTO=none
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
NAME=eth0
DEVICE=eth0
ONBOOT=yes
IPADDR=10.0.0.201
PREFIX=24
GATEWAY=10.0.0.254
DNS1=223.5.5.5
DNS2=223.6.6.6
END
cat  >ifcfg-eth1<<END
TYPE=Ethernet
BOOTPROTO=none
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
NAME=eth1
DEVICE=eth1
ONBOOT=yes
IPADDR=172.16.1.200
PREFIX=24
END

3. 修改并生成grub配置

[root@CentOS7 network-scripts]# vim   /etc/sysconfig/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="rhgb net.ifnames=0 biosdevname=0 quiet"
GRUB_DISABLE_RECOVERY="true"
[root@CentOS7 network-scripts]# 

4. 生成grub启动菜单

[root@CentOS7 network-scripts]# 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-4860b79d6cd240788b962a1dbdef488d
Found initrd image: /boot/initramfs-0-rescue-4860b79d6cd240788b962a1dbdef488d.img
done
[root@CentOS7 network-scripts]# 

5. 重启系统

reboot

6. 其他

如果是在新装的centos7机器上，那么会有好些命令没有那么可以装一些命令

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
yum install wget net-tools vim   bash-completion   lrzsz nmap nc tree -y
systemctl stop firewalld.service
systemctl disable firewalld.service
sed -i.ori 's#SELINUX=enforcing#SELINUX=disabled#' /etc/selinux/config