linux系统网卡问题及解决方案
网卡设置相关指令:
查看虚拟机网络:ifconfig -a
设置网卡ip: ifconfig eth0 192.168.124.28 netmask 255.255.255.0
开启网卡:ifconfig eth0 up
关闭网卡:ifconfig eth 0 down
1:虚拟机第一次启动或重启后只有ens33网卡而没有eth0网卡
网上方案,亲测可用:
vmware安装的centos7中没有出现eth0网卡,也没有ip,不能连接本地,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(注:不需要增加IPADDR等,设置桥接重启后自动带有ip)
具体命令:
1. [[email protected] ~]# 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
2.重命名网卡配置文件ifcfg-ens33为ifcfg-eth0
具体命令:
1. [[email protected] ~]# cd /etc/sysconfig/network-scripts/
2. [[email protected] 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. [[email protected] network-scripts]# vi /etc/default/grub
2.
3. GRUB_TIMEOUT=5
4. GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
5. GRUB_DEFAULT=saved
6. GRUB_DISABLE_SUBMENU=true
7. GRUB_TERMINAL_OUTPUT="console"
8. GRUB_CMDLINE_LINUX="crashkernel=auto net.ifnames=0 biosdevname=0 rhgb quiet"
9. 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. [[email protected] 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
5.重启系统
1. [[email protected] network-scripts]# reboot
6.输入ifconfig验证