• Setup network on centos 7


    How to Setup network on centos 7

     
    After installing Centos 7, You may not able to connect network in that machine. This will happen because Ethernet interfaces are not enabled by default.This guide will help you to setup network on centos 7 .
    This guide contains network configuration steps both in GUI and command mode.

    Setup network on centos 7

    let’s start, Type “nmcli d” command in your terminal for quick identification of Ethernet cards installed in your machine.
    Setup network on centos 7
    Here we have 2 interfaces named “enp0s17” and “enp0s18” . it might be different in your case ( Eg: em1 or p4p1 ).

    GUI Mode

    Recommended for beginners
    Step 1 » Type this command “nmtui” to open Network manager and press enter after choosing ” Edit a connection” ( Use TAB for choosing options ) .
    Setup network on centos 7
    Step 2 » Now you can see all network interfaces, choose one and click “Edit“.
    Setup network on centos 7

    » DHCP configuration

    Step 3 » For DHCP,
    1. Choose “Automatic” in IPv4 CONFIGURATION.
    2. Choose Automatic Connect check box.
    3. Press OK and quit Network manager.
    Setup network on centos 7
    Now Restart network service by typing below command.
    systemctl restart networkNow your server will get IP Address from DHCP .

    » Static configuration

    Step 4 » For manual IP address,
    1. Choose “Manual” in IPv4 CONFIGURATION.
    2. Add IP Address with Subnet , Gateway and DNS server ( Refer below image ).
    3. Choose Automatic Connect check box.
    4. Press OK and quit Network manager.
    Setup network on centos 7
    Now Restart network service by typing below command.
    systemctl restart networkThat’s it, Interface will have static IP.

    Command Mode

    Step 1 » Network interface config files are located in /etc/sysconfig/network-scripts/ directory. Open ifcfg-enp0s17 file ( For interface enp0s17 ) and you can see the content like below.
    [root@krizna ~]# vi /etc/sysconfig/network-scripts/ifcfg-enp0s17
    TYPE=Ethernet
    BOOTPROTO=none
    DEFROUTE=yes
    IPV4_FAILURE_FATAL=no
    IPV6INIT=yes
    IPV6_AUTOCONF=yes
    IPV6_DEFROUTE=yes
    IPV6_FAILURE_FATAL=no
    NAME=enp0s17
    UUID=7f1aff2d-b154-4436-9497-e3a4dedddcef
    ONBOOT=no
    HWADDR=00:0C:29:A1:B5:D6
    PEERDNS=yes
    PEERROUTES=yes
    IPV6_PEERDNS=yes
    IPV6_PEERROUTES=yes

    » DHCP configuration

    Step 2 » For DHCP
    Find the below lines in config File.
    BOOTPROTO=none
    ONBOOT=no
    and replace with
    BOOTPROTO=dhcp
    ONBOOT=yes
    Now Restart network service by typing below command.
    systemctl restart networkNow your server will get IP Address from DHCP

    » Static configuration

    Step 3 » For Static IP.
    Find the below lines in config File.
    BOOTPROTO=none
    ONBOOT=no
    and replace with
    BOOTPROTO=static
    ONBOOT=yes
    And add the below lines at the end of the file.
    IPADDR=172.27.0.32
    NETMASK=255.255.255.0
    GATEWAY=172.27.0.1
    DNS1=172.27.0.5
    File will look like below after changes.
    TYPE=Ethernet
    BOOTPROTO=static
    DEFROUTE=yes
    IPV4_FAILURE_FATAL=no
    IPV6INIT=yes
    IPV6_AUTOCONF=yes
    IPV6_DEFROUTE=yes
    IPV6_FAILURE_FATAL=no
    NAME=enp0s17
    UUID=f0c5b37d-299a-43cb-b74b-618bb252d129
    ONBOOT=yes
    HWADDR=00:0C:29:A1:B5:CC
    IPV6_PEERDNS=yes
    IPV6_PEERROUTES=yes
    IPADDR=192.168.1.10
    NETMASK=255.255.255.0
    GATEWAY=192.168.1.1
    DNS1=192.168.1.5

    Now Restart network service by typing below command.
    systemctl restart networkNow Interface will have static IP.
    Additionally you can use /etc/sysconfig/network file for hostname and DNS .
    HOSTNAME=server.krizna.com
    DNS1=192.168.1.5
    DNS2=8.8.8.8
    SEARCH=krizna.com

    Have a nice day

  • 相关阅读:
    虚函数/纯虚函数/抽象类/接口/虚基类
    泛型编程
    C++解题报告 : 迭代加深搜索之 ZOJ 1937 Addition Chains
    C++题解:Matrix Power Series ——矩阵套矩阵的矩阵加速
    C++矩阵加速经典题目:Warcraft III 守望者的烦恼 [vijos 1067]
    C++数论板题(弹药科技):Lengendre定理和欧拉函数
    Java并发工具包提供了哪些并发工具类
    Mac OS X系统深入了解--系统文件结构篇(二)
    Mac OS X系统深入了解--系统文件结构篇(一)
    Java Web(一) Servlet详解!!
  • 原文地址:https://www.cnblogs.com/gaohong/p/4831381.html
Copyright © 2020-2023  润新知