CentOS终于有了中国镜像

对在中国的CentOS支持者们，一件好事情：CentOS终于有了在中国的镜像，分别设在上海、香港、福建。

活用这个资源的之一，就是通过yum高速更新系统。

在初始环境设置中，我们可以将yum作为一项常驻的服务自动更新系统，但默认的服务器是官方的站点，离中国用户比较远，速度不堪忍受。但修改yum相应配置文件就可以达到高速更新系统的目的，方法如下：

修改/etc/yum.repos.d/CentOS-Base.repo，将镜象站点地址改为在中国的景象站点地址。如下：

1. # CentOS-Base.repo
   
2. #
   
3. # This file uses a new mirrorlist system developed by Lance Davis for CentOS.
   
4. # The mirror system uses the connecting IP address of the client and the
   
5. # update status of each mirror to pick mirrors that are updated to and
   
6. # geographically close to the client.  You should use this for CentOS updates
   
7. # unless you are manually picking other mirrors.
   
8. #
   
9. # If the mirrorlist= does not work for you, as a fall back you can try the
   
10. # remarked out baseurl= line instead.
    
11. #
    
12. #
    
13. 
    
14. [base]
    
15. name=CentOS-$releasever - Base
    
16. baseurl=
    
17.         
    
18.         
    
19.         
    
20. gpgcheck=1
    
21. gpgkey=
    
22. 
    
23. #released updates
    
24. [update]
    
25. name=CentOS-$releasever - Updates
    
26. baseurl=
    
27.         
    
28.         
    
29.         
    
30. gpgcheck=1
    
31. gpgkey=
    
32. 
    
33. #packages used/produced in the build but not released
    
34. [addons]
    
35. name=CentOS-$releasever - Addons
    
36. baseurl=
    
37.         
    
38.         
    
39.         
    
40. gpgcheck=1
    
41. gpgkey=
    
42. 
    
43. #additional packages that may be useful
    
44. [extras]
    
45. name=CentOS-$releasever - Extras
    
46. baseurl=
    
47.         
    
48.         
    
49.         
    
50. gpgcheck=1
    
51. gpgkey=
    
52. 
    
53. #additional packages that extend functionality of existing packages
    
54. [centosplus]
    
55. name=CentOS-$releasever - Plus
    
56. baseurl=
    
57. gpgcheck=1
    
58. enabled=0
    
59. gpgkey=
    
60. 
    
61. #contrib - packages by Centos Users
    
62. [contrib]
    
63. name=CentOS-$releasever - Contrib
    
64. baseurl=
    
65. gpgcheck=1
    
66. enabled=0
    
67. gpgkey=

复制代码

然后更新一次系统，并将yum设置为自启动，让其即时自动为系统更新。

# yum -y update

# chkconfig yum on

# /etc/rc.d/init.d/yum start