在网上找了不少东西，有的就是贴了个repo的文件，还是自己整理下，软件源设置好了，才可以快速的安装软件呀！
- 首先介绍一下CentOS的repo文件的结构： [base]
name=CentOS-$releasever - Base
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
#baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6【base】：代表容器的名字，中括号一定要存在，里面的名字可以任取，不可重名；name:说明一下这个容器的意义，不是很重要；
mirrorlist=: 列出这个容器可以使用的镜像站点，如果不想使用，可以注释掉（默认用'#'）；
baseurs=: 这个很重要,后面接的是容器的实际网址，mirrorlist是由yum程序自行去找镜像站点，baseurl则是指定固定的一个容器网址，我们要添加的网址就在这里；
gpgcheck=: 这个是RPM的数字证书了，指定对应安装文件的数字证书，也就是类似于电驴的校验码了，和每个文件的大小内容有关的签证，可以用来验证文件是否更改，下载是否成功等，有了这个你就不怕你安装的东西是骇客植入了病毒的文件了。
gpgkey=: 这个是数字证书的公钥文件所在的位置。 现在根据我们的国情(china)设置我们的文件，我们用的比较多的就是中科大的源
http://centos.ustc.edu.cn/centos/（教育网爽了），163http://mirrors.163.com/centos/中国移动http://mirrors.ta139.com/centos修改repo文件，总结来说就是注释mirrorlist,添加baseurl，如下是我的：
1 [base]
2 name=CentOS-$releasever - Base
3 #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
4 #baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
5 baseurl=http://centos.ustc.edu.cn/centos/$releasever/contrib/$basearch/
6 http://mirrors.163.com/centos/$releasever/contrib/$basearch/
7 http://mirrors.ta139.com/centos/$releasever/contrib/$basearch/
8 http://mirror.neu.edu.cn/centos/$releasever/contrib/$basearch/
9 gpgcheck=1
10 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6
11
12 #released updates
13 [updates]
14 name=CentOS-$releasever - Updates
15 #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
16 #baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/
17 baseurl=http://centos.ustc.edu.cn/centos/$releasever/contrib/$basearch/
18 http://mirrors.163.com/centos/$releasever/contrib/$basearch/
19 http://mirrors.ta139.com/centos/$releasever/contrib/$basearch/
20 http://mirror.neu.edu.cn/centos/$releasever/contrib/$basearch/
21 gpgcheck=1
22 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6
23
24 #additional packages that may be useful
25 [extras]
26 name=CentOS-$releasever - Extras
27 #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
28 #baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/
29 baseurl=http://centos.ustc.edu.cn/centos/$releasever/contrib/$basearch/
30 http://mirrors.163.com/centos/$releasever/contrib/$basearch/
31 http://mirrors.ta139.com/centos/$releasever/contrib/$basearch/
32 http://mirror.neu.edu.cn/centos/$releasever/contrib/$basearch/
33 gpgcheck=1
34 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6
35
36 #additional packages that extend functionality of existing packages
37 [centosplus]
38 name=CentOS-$releasever - Plus
39 #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
40 #baseurl=http://mirror.centos.org/centos/$releasever/centosplus/$basearch/
41 baseurl=http://centos.ustc.edu.cn/centos/$releasever/contrib/$basearch/
42 http://mirrors.163.com/centos/$releasever/contrib/$basearch/
43 http://mirrors.ta139.com/centos/$releasever/contrib/$basearch/
44 http://mirror.neu.edu.cn/centos/$releasever/contrib/$basearch/
45 gpgcheck=1
46 enabled=0
47 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6
48
49 #contrib - packages by Centos Users
50 [contrib]
51 name=CentOS-$releasever - Contrib
52 #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib
53 #baseurl=http://mirror.centos.org/centos/$releasever/contrib/$basearch/
54 baseurl=http://centos.ustc.edu.cn/centos/$releasever/contrib/$basearch/
55 http://mirrors.163.com/centos/$releasever/contrib/$basearch/
56 http://mirrors.ta139.com/centos/$releasever/contrib/$basearch/
57 http://mirror.neu.edu.cn/centos/$releasever/contrib/$basearch/
58 gpgcheck=1
59 enabled=0
60 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6测试一下：
yum repolist all #列出现在yum server所使用的容器有哪些1 [root@localhost yum.repos.d]# yum repolist all
2 Loaded plugins: fastestmirror, refresh-packagekit
3 Loading mirror speeds from cached hostfile
4 base | 951 B 00:00
5 base/primary | 201 B 00:00
6 extras | 951 B 00:00
7 Not using downloaded repomd.xml because it is older than what we have:
8 Current : Mon Sep 26 21:11:35 2011
9 Downloaded: Sun Jul 10 21:28:07 2011
10 updates | 951 B 00:00
11 updates/primary | 201 B 00:00
12 repo id repo name status
13 base CentOS-6 - Base enabled: 0
14 c6-media CentOS-6 - Media disabled
15 centosplus CentOS-6 - Plus disabled
16 contrib CentOS-6 - Contrib disabled
17 debug CentOS-6 - Debuginfo disabled
18 extras CentOS-6 - Extras enabled: 1
19 updates CentOS-6 - Updates enabled: 0
20 repolist: 1如果有问题可以使用清除功能：
yum clean all #所有容器的数据删除更新一下全系统：
yum -y update #系统整体升级查看所有的内核
rpm -q kernel #查询存在的内核版本删除新的内核（应该要重启进入新的内核版本再删吧，呵呵，没有试过当前版本删除！）
rpm -e kernel-2.6.32-71.29.1.el6.i686 #删除你查询到的旧内核，复制粘贴就比较方便了！