前幾天我最小化安裝了一下CentOS7，進入系統發現沒有ifconfig這個網絡配置工作，又想急著上網，那怎麼辦呀。下面是我給出的解決方法：
1、用光驅配置yum源，安裝net-tools這個軟件包（或者用rpm這個命令）。
1.1、把CentOS默認的yum源除（CentOS-Media.repo）都移動到一個指定的目錄，我是在yum源配置文件存放目中建了一個叫repo的子目錄，以下是具體操作：
[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、掛載光驅配置yum源的具體操作步驟：
[root@bogon yum.repos.d]# mount /dev/sr0 /media/
mount: /dev/sr0 is write-protected, mounting read-only
#以上是掛載光驅的命令和操作步驟
[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
#以上光驅yum源的配置文檔
[root@bogon yum.repos.d]# yum list | wc -l
3776
#用yum list查看測試yum源是否存在問題
1.3、用yum安裝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、測試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
2、在linux中除了ifconfig這個命令可以配置IP地址之外還有一個命令就是ip了（本人用的是這種方法）。
[root@bogon yum.repos.d]# ip addr l eno16777736
2: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> 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這個命令和博大精深不是一兩句話就可以說明的，在以後網絡學習的時候我會給大家進行詳細認真的講解，再給大家提一下關於網卡，在CentOS7以後默認的網卡類型標識符為eno16777736，在以前的系統為ethN。
