centos7中输入ifconfig出现ens33，没有eth0

vmware安装的centos7中没有出现eth0网卡，也没有ip，不能上网，输入ifconfig后如下图

解决办法

1.编辑网卡的配置文件 vi /etc/sysconfig/network-scripts/ifcfg-ens33 将里面的NAME和DEVICE项修改为eth0

1. [root@localhost ~]# vi /etc/sysconfig/network-scripts/ifcfg-ens33
2. TYPE=Ethernet
3. BOOTPROTO=static
4. IPADDR=192.168.0.116
5. NETMASK=255.255.255.0
6. GATEWAY=192.168.0.115
7. DNS1=114.114.114.114
8. DNS2=8.8.8.8
9. DEFROUTE=yes
10. PEERDNS=yes
11. PEERROUTES=yes
12. IPV4_FAILURE_FATAL=no
13. IPV6INIT=yes
14. IPV6_AUTOCONF=yes
15. IPV6_DEFROUTE=yes
16. IPV6_PEERDNS=yes
17. IPV6_PEERROUTES=yes
18. IPV6_FAILURE_FATAL=no
19. IPV6_ADDR_GEN_MODE=stable-privacy
20. NAME=eth0
21. UUID=972a1eb3-049f-4db2-80f5-7d8fd28ef76f
22. DEVICE=eth0
23. ONBOOT=yes

[root@localhost ~]# vi /etc/sysconfig/network-scripts/ifcfg-ens33
TYPE=Ethernet
BOOTPROTO=static
IPADDR=192.168.0.116
NETMASK=255.255.255.0
GATEWAY=192.168.0.115
DNS1=114.114.114.114
DNS2=8.8.8.8
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=eth0
UUID=972a1eb3-049f-4db2-80f5-7d8fd28ef76f
DEVICE=eth0
ONBOOT=yes

2.重命名网卡配置文件ifcfg-ens33为ifcfg-eth0

1. [root@localhost ~]# cd /etc/sysconfig/network-scripts/
2. [root@localhost network-scripts]# mv ifcfg-ens33 ifcfg-eth0

[root@localhost ~]# cd /etc/sysconfig/network-scripts/
[root@localhost network-scripts]# mv ifcfg-ens33 ifcfg-eth0

3.编辑/etc/default/grub并加入“net.ifnames=0 biosdevname=0 ”到GRUBCMDLINELINUX变量

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

[root@localhost network-scripts]# 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"
GRUB_DISABLE_RECOVERY="true"   

4.运行命令grub2-mkconfig -o /boot/grub2/grub.cfg 来重新生成GRUB配置并更新内核参数。

1. [root@localhost network-scripts]# grub2-mkconfig -o /boot/grub2/grub.cfg
2. Generating grub configuration file ...
3. Found linux image: /boot/vmlinuz-3.10.0-514.el7.x86_64
4. Found initrd image: /boot/initramfs-3.10.0-514.el7.x86_64.img
5. Found linux image: /boot/vmlinuz-0-rescue-b7f83ca165964a47b8b283907b126140
6. Found initrd image: /boot/initramfs-0-rescue-b7f83ca165964a47b8b283907b126140.img
7. done

[root@localhost network-scripts]# grub2-mkconfig -o /boot/grub2/grub.cfg
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-3.10.0-514.el7.x86_64
Found initrd image: /boot/initramfs-3.10.0-514.el7.x86_64.img
Found linux image: /boot/vmlinuz-0-rescue-b7f83ca165964a47b8b283907b126140
Found initrd image: /boot/initramfs-0-rescue-b7f83ca165964a47b8b283907b126140.img
done

5.重启系统

1. [root@localhost network-scripts]# reboot

[root@localhost network-scripts]# reboot

6.输入ifconfig验证

亲测可行