Ubuntu/Linux网络配置常用命令

配置ip

打开配置文件

sudo vim /etc/network/interfaces

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
#auto enp0s3
#iface enp0s3 inet dhcp

auto enp0s3
iface enp0s3 inet static
address 192.168.1.122
netmask 255.255.255.0
gateway 192.168.1.1

重启网络

sudo /etc/init.d/networking restart

关闭防火墙(详情:https://www.cnblogs.com/kluan/p/5993767.html)

sudo ufw disable 

查看防火墙的状态：(状态显示是“inactive”关闭状态。)如果ping不通大多是防火墙的问题

sudo ufw status

修改dns /etc/resolvconf/resolv.conf.d/base里面是空的添加

nameserver 你的DNS1

nameserver 你的DNS2

修改DNS楼主亲测 vim /etc/resolv.conf(阿里的DNS)

nameserver 223.5.5.5
nameserver 223.6.6.6

重启网络

sudo /etc/init.d/networking restart
//14.01版本
sudo ifconfig eth0 down
sudo ifconfig eth0 up

默认重启命令行模式

vim  /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT=""改GRUB_CMDLINE_LINUX_DEFAULT="test"
sudo update-grub

查看网卡名

ls /proc/sys/net/ipv4/conf

刷新ip

ip addr flush dev

修改网卡名称

http://blog.csdn.net/wenwenxiong/article/details/52937539

http://blog.csdn.net/wy_97/article/details/78294562

温馨提示:

1.虚拟主机和主机之间ip不通,怎么办?

答:绝大多数都是防火墙的问题

2.如果虚拟主机和主机之间可以ping通, 但是不能上网怎么办?

答:肯定是DNS配置问题.