centos配置网卡（设置静态IP）

１.修改网卡配置　编辑：vi /etc/sysconfig/network-scripts/ifcfg-eth0

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DEVICE=eth0 #描述网卡对应的设备别名，例如ifcfg-eth0的文件中它为eth0

BOOTPROTO=static #设置网卡获得ip地址的方式，可能的选项为static，dhcp或bootp，分别对应静态指定的 ip地址，通过dhcp协议获得的ip地址，通过bootp协议获得的ip地址

IPADDR=192.168.119.224 #如果设置网卡获得 ip地址的方式为静态指定，此字段就指定了网卡对应的ip地址

NETMASK=255.255.255.0 #网卡对应的网络掩码

2.修改网关配置

　编辑：vi /etc/sysconfig/network　修改添加GATEWAY

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NETWORKING=yes        #表示系统是否使用网络，一般设置为yes。如果设为no，则不能使用网络，而且很多系统服务程序将无法启动

HOSTNAME=centos        #设置本机的主机名，这里设置的主机名要和/etc/hosts中设置的主机名对应

GATEWAY=192.168.119.1        #设置本机连接的网关的IP地址。

3.修改DNS 配置

编辑：vi /etc/resolv.conf　修改后如下：　

nameserver　即是DNS服务器ＩＰ地址，第一个是首选，第二个是备用。

4.重启网络服务

　　执行命令：

service network restar或/etc/init.d/network restart

安装setup tools、

1、安装setup工具及组件

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yum install setuptool    #安装setup工具
#安装工具组件

yum install ntsysv    #系统服务

yum install system-config-network-tui    #网络服务

yum install system-config-securitylevel-tui    #防火墙配置

2、配置网卡IP

如果没有没配置DNS使用yum安装时可能会报错

[[email protected] ~]# yum install lrzsz
Loaded plugins: fastestmirror
Setting up Install Process
Loading mirror speeds from cached hostfile

Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=6&arch=x86_64&repo=os&infra=stock error was

14: PYCURL ERROR 6 - "Couldn't resolve host 'mirrorlist.centos.org'"

Error: Cannot find a valid baseurl for repo: base

[[email protected] ~]# vi /etc/resolv.conf 

[[email protected] ~]# yum install lrzsz
Loaded plugins: fastestmirror
Setting up Install Process
Loading mirror speeds from cached hostfile

 * base: mirrors.163.com

 * extras: mirrors.163.com

 * updates: centos.ustc.edu.cn
base                                                                                                                                                               | 3.7 kB     00:00     

base/primary_db                                                                                                                                                    | 4.7 MB     00:00     
extras                                                                                                                                                             | 3.4 kB     00:00     

extras/primary_db                                                                                                                                                  |  37 kB     00:00     
updates                                                                                                                                                            | 3.4 kB     00:00     

updates/primary_db                                                                                                                                                 | 4.3 MB     00:01     
Resolving Dependencies
--> Running transaction check
---> Package lrzsz.x86_64 0:0.12.20-27.1.el6 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
==========================================================================================================================================================================================

 Package                                   Arch                                       Version                                              Repository                                Size
==========================================================================================================================================================================================
Installing:

 lrzsz                                     x86_64                                     0.12.20-27.1.el6                                     base                                      71 k
Transaction Summary
==========================================================================================================================================================================================
Install       1 Package(s)
Total download size: 71 k
Installed size: 159 k

Is this ok [y/N]: y
Downloading Packages:
lrzsz-0.12.20-27.1.el6.x86_64.rpm                                                                                                                                  |  71 kB     00:00     

warning: rpmts_HdrFromFdno: Header V3 RSA/SHA256 Signature, key ID c105b9de: NOKEY

Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
Importing GPG key 0xC105B9DE:

 Userid : CentOS-6 Key (CentOS 6 Official Signing Key) <[email protected]>

 Package: centos-release-6-8.el6.centos.12.3.x86_64 (@anaconda-CentOS-201605220104.x86_64/6.8)

 From   : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

Is this ok [y/N]: y
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction

  Installing : lrzsz-0.12.20-27.1.el6.x86_64                                                                                                                                          1/1 

  Verifying  : lrzsz-0.12.20-27.1.el6.x86_64                                                                                                                                          1/1 
Installed:

  lrzsz.x86_64 0:0.12.20-27.1.el6                                                                                                                                                         
Complete!

[[email protected] ~]#

centos7按照初始安装时候的developer类型一路装好,在vmware里已经设置为bridge模式，按理说是会自动按照DHCP联网成功的，结果却发现连网卡都没有**，这里记录下。

配置网卡

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vim /etc/sysconfig/network-scripts/ifcfg-ens33

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HWADDR=00:0C:29:2C:E5:30
TYPE=Ethernet
BOOTPROTO=static

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
NAME=ens33
UUID=ea35e10e-ff50-4a7a-92d5-ab54c58d8b44
ONBOOT=no

没想到在centos7里默认是不启动网卡的，奇怪的设定啊，所以网卡才没有** 改为yes，然后再加上以下几个参数的设置

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IPADDR=192.168.2.181
GATEWAY=192.168.2.1
DNS1=114.114.114.114
DNS2=8.8.8.8

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nameserver 114.114.114.114nameserver 8.8.8.8

如果按照上面把/etc/resolv.conf中的dns也配置好之后

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sudo service network restart

ps:也可以使用system-config-network-tui这个软件以GUI方式进行配置，用yum安装即可。

本文转自运维小当家 51CTO博客，原文链接：http://blog.51cto.com/solin/1861888，如需转载请自行联系原作者