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<UP,BROADCAST,RUNNING,MULTICAST> 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<link>
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<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
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