• 一、前言
• 二、操作步骤
  • 1. 确认网卡配置文件
  • 2. 修改网卡配置文件
  • 3. 重启网络服务并验证

一、前言

• 适用的系统版本
  • CentOS 6
  • CentOS 7

二、操作步骤

1. 确认网卡配置文件

• 查看网络连接信息

  [root@localhost ~]# ifconfig
  enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
          inet 192.168.56.103  netmask 255.255.255.0  broadcast 192.168.56.255
          inet6 fe80::42b9:b238:84e2:e586  prefixlen 64  scopeid 0x20<link>
          ether 08:00:27:e3:b8:cc  txqueuelen 1000  (Ethernet)
          RX packets 52  bytes 7763 (7.5 KiB)
          RX errors 0  dropped 0  overruns 0  frame 0
          TX packets 50  bytes 7259 (7.0 KiB)
          TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
  
  lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
          inet 127.0.0.1  netmask 255.0.0.0
          inet6 ::1  prefixlen 128  scopeid 0x10<host>
          loop  txqueuelen 1000  (Local Loopback)
          RX packets 0  bytes 0 (0.0 B)
          RX errors 0  dropped 0  overruns 0  frame 0
          TX packets 0  bytes 0 (0.0 B)
          TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

  输出的第一行信息说明，网卡设备名是：enp0s3 那么网卡配置文件就是：/etc/sysconfig/network-scripts/ifcfg-enp0s3

2. 修改网卡配置文件

• 修改网卡配置文件

  vi /etc/sysconfig/network-scripts/ifcfg-enp0s3

• 修改以下配置

  # 将BOOTPROTO由dhcp改为static
  BOOTPROTO=static
  # 将ONBOOT改成yes
  ONBOOT=yes

• 增加以下配置

  	IPADDR=192.168.0.200 #静态IP
  	NETMASK=255.255.255.0 #子网掩码
  	GATEWAY=192.168.0.1 #默认网关  
  	DNS1=192.168.0.1 #DNS1 配置
  	DNS2=192.168.1.1 #DNS2 配置

3. 重启网络服务并验证

• 重启网络服务

  #CentOS6
  service network restart 
  
  #CentOS7
  systemctl restart network

• 查看IP

  # 如果命令没找到 yum 安装相关包 yum -y install net-tools
  ifconfig