前几天我最小化安装了一下CentOS7，进入系统发现没有ifconfig这个网络配置工作，又想急着上网，那怎么办呀。下面是我给出的解决方法：

1、用光驱配置yum源，安装net-tools这个软件包(或者用rpm这个命令)。

1.1、把CentOS默认的yum源除(CentOS-Media.repo)都移动到一个指定的目录，我是在yum源配置文件存放目中建了一个叫repo的子目录，以下是具体操作：

[root@bogon ~]# cd /etc/yum.repos.d/

[root@bogon yum.repos.d]# ls

CentOS-Base.repo  CentOS-CR.repo  CentOS-Debuginfo.repo  CentOS-fasttrack.repo  CentO    S-Media.repo  CentOS-Sources.repo  CentOS-Vault.repo

[root@bogon yum.repos.d]# mkdir repo

[root@bogon yum.repos.d]# ls

CentOS-Base.repo  CentOS-Debuginfo.repo  CentOS-Media.repo    CentOS-Vault.repo

CentOS-CR.repo    CentOS-fasttrack.repo  CentOS-Sources.repo  repo

[root@bogon yum.repos.d]# mv *.repo repo/

[root@bogon yum.repos.d]# ls

repo

[root@bogon yum.repos.d]# cd repo/

[root@bogon repo]# ls

CentOS-Base.repo  CentOS-CR.repo  CentOS-Debuginfo.repo  CentOS-fasttrack.repo  CentO    S-Media.repo  CentOS-Sources.repo  CentOS-Vault.repo

[root@bogon repo]# mv CentOS-Media.repo ../

[root@bogon repo]# ls

CentOS-Base.repo  CentOS-CR.repo  CentOS-Debuginfo.repo  CentOS-fasttrack.repo  CentO    S-Sources.repo  CentOS-Vault.repo

[root@bogon repo]# cd ..

[root@bogon yum.repos.d]# ls

CentOS-Media.repo  repo

1.2、挂载光驱配置yum源的具体操作步骤：

[root@bogon yum.repos.d]# mount /dev/sr0 /media/

mount: /dev/sr0 is write-protected, mounting read-only

#以上是挂载光驱的命令和操作步骤

[root@bogon yum.repos.d]# cat CentOS-Media.repo

[c7-media]

name=CentOS-$releasever - Media

baseurl=file:///media/

gpgcheck=1

enabled=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#以上光驱yum源的配置文档

[root@bogon yum.repos.d]# yum list | wc -l

3776

#用yum list查看测试yum源是否存在问题

1.3、用yum安装net-tools工具包

[root@bogon yum.repos.d]# yum install net-tools -y

Loaded plugins: fastestmirror, langpacks

Loading mirror speeds from cached hostfile

Resolving Dependencies

--> Running transaction check

---> Package net-tools.x86_64 0:2.0-0.17.20131004git.el7 will be installed

--> Finished Dependency Resolution

…………

Running transaction

Installing : net-tools-2.0-0.17.20131004git.el7.x86_64                                                                                  1/1

Verifying  : net-tools-2.0-0.17.20131004git.el7.x86_64                                                                                  1/1

Installed:

net-tools.x86_64 0:2.0-0.17.20131004git.el7

Complete!

1.4、测试ifconfig命令

[root@bogon yum.repos.d]# ifconfig

eno16777736: flags=4163  mtu 1500

inet 192.168.1.131  netmask 255.255.255.0  broadcast 192.168.1.255

inet6 fe80::20c:29ff:fe2d:c130  prefixlen 64  scopeid 0x20

ether 00:0c:29:2d:c1:30  txqueuelen 1000  (Ethernet)

RX packets 53366  bytes 3890372 (3.7 MiB)

RX errors 0  dropped 0  overruns 0  frame 0

TX packets 47832  bytes 22949340 (21.8 MiB)

TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73  mtu 65536

inet 127.0.0.1  netmask 255.0.0.0

inet6 ::1  prefixlen 128  scopeid 0x10

loop  txqueuelen 0  (Local Loopback)

RX packets 58  bytes 5088 (4.9 KiB)

RX errors 0  dropped 0  overruns 0  frame 0

TX packets 58  bytes 5088 (4.9 KiB)

TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

2、在linux中除了ifconfig这个命令可以配置IP地址之外还有一个命令就是ip了(本人用的是这种方法)。

[root@bogon yum.repos.d]# ip addr l eno16777736

2: eno16777736: mtu 1500 qdisc pfifo_fast state UP qlen 1000

link/ether 00:0c:29:2d:c1:30 brd ff:ff:ff:ff:ff:ff

inet 192.168.1.131/24 brd 192.168.1.255 scope global eno16777736

valid_lft forever preferred_lft forever

inet6 fe80::20c:29ff:fe2d:c130/64 scope link

valid_lft forever preferred_lft forever

[root@bogon yum.repos.d]# ip addr add 192.168.1.131/24 dev eno16777736

ip这个命令和博大精深不是一两句话就可以说明的，在以后网络学习的时候我会给大家进行详细认真的讲解，再给大家提一下关于网卡，在CentOS7以后默认的网卡类型标识符为eno16777736，在以前的系统为ethN。