关于旧版CentOS（5.0以下）无法执行yum install的问题

CentOS 前端之家
前端之家收集整理的这篇文章主要介绍了关于旧版CentOS（5.0以下）无法执行yum install的问题，前端之家小编觉得挺不错的，现在分享给大家，也给大家做个参考。
转载地址：http://blog.chinaunix.net/uid-20731487-id-3504282.html

由于种种原因，比如需要一直延用过去构筑的系统，或者是为了模拟旧版RedHat Enterprise版（RedHat的收费版，CentOS可以说是它的山寨版）等等，会有需要继续使用旧版的CentOS的情况。

但是由于CentOS的各个服务镜像几乎已经不支持旧版系统的升级，升级yum的时候会遇到以下问题。

# yum update
Setting up Update Process
Setting up repositories
not using ftp,http[s],or file for repos,skipping - 4 is not a valid release or hasnt been released yet
Cannot find a valid baseurl for repo: update
Error: Cannot find a valid baseurl for repo: update

提示已经找不到提供升级的支持了。但如果又非要继续使用旧版CenOS呢？我们从这里得到了启示。http://mirror.centos.org/centos/4.9/readme 

This directory (and version of CentOS) is depreciated.  

CentOS-4 is now past EOL

You can get the last released version of centos 4.9 here:

http://vault.centos.org/4.9/

对，http://vault.centos.org/还提供旧版的升级，所以我们必须修改配置文件（/etc/yum.repos.d/CentOS-Base.rpeo）来定向到这个镜像站点。方法如下


  1. --- /etc/yum.repos.d/CentOS-Base.repo.orig
  2. +++ /etc/yum.repos.d/CentOS-Base.repo
  3. @@ -13,8 +13,9 @@

  5. [base]
  6. name=CentOS-$releasever - Base
  7. -mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
  8. +#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
  9. #baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
  10. +baseurl=http://vault.centos.org/4.9/os/$basearch/
  11. gpgcheck=1
  12. gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos4
  13. priority=1
  14. @@ -23,8 +24,9 @@
  15. #released updates
  16. [update]
  17. name=CentOS-$releasever - Updates
  18. -mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
  19. +#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
  20. #baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/
  21. +baseurl=http://vault.centos.org/4.9/updates/$basearch/
  22. gpgcheck=1
  23. gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos4
  24. priority=1
  25. @@ -33,8 +35,9 @@
  26. #packages used/produced in the build but not released
  27. [addons]
  28. name=CentOS-$releasever - Addons
  29. -mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=addons
  30. +#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=addons
  31. #baseurl=http://mirror.centos.org/centos/$releasever/addons/$basearch/
  32. +baseurl=http://vault.centos.org/4.9/addons/$basearch/
  33. gpgcheck=1
  34. gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos4
  35. priority=1
  36. @@ -43,8 +46,9 @@
  37. #additional packages that may be useful
  38. [extras]
  39. name=CentOS-$releasever - Extras
  40. -mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
  41. +#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
  42. #baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/
  43. +baseurl=http://vault.centos.org/4.9/extras/$basearch/
  44. gpgcheck=1
  45. gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos4
  46. priority=1
  47. @@ -53,8 +57,9 @@
  48. #additional packages that extend functionality of existing packages
  49. [centosplus]
  50. name=CentOS-$releasever - Plus
  51. -mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
  52. +#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
  53. #baseurl=http://mirror.centos.org/centos/$releasever/centosplus/$basearch/
  54. +baseurl=http://vault.centos.org/4.9/centosplus/$basearch/
  55. gpgcheck=1
  56. enabled=0
  57. gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos4
  58. @@ -64,8 +69,9 @@
  59. #contrib - packages by Centos Users
  60. [contrib]
  61. name=CentOS-$releasever - Contrib
  62. -mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib
  63. +#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib
  64. #baseurl=http://mirror.centos.org/centos/$releasever/contrib/$basearch/
  65. +baseurl=http://vault.centos.org/4.9/contrib/$basearch/
  66. gpgcheck=1
  67. enabled=0
  68. gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos4
这样一来我们可以正常使用yum update了。 


# yum update
Setting up Update Process
Setting up repositories
update                    100% |=========================|  951 B    00:00     
base                      100% |=========================| 1.1 kB    00:00     
addons                    100% |=========================|  951 B    00:00     
extras                    100% |=========================| 1.1 kB    00:00     
Reading repository Metadata in from local files
primary.xml.gz            100% |=========================| 843 kB    00:01     
sqlite cache needs updating,reading in Metadata
update    : ################################################## 1920/1920
No Packages marked for Update/Obsoletion

CentOS2，3的情况还没有确认过，理论上都行得通。不过嘛，如果没有特殊情况还是升级你的CentOS吧
原文链接：https://www.f2er.com/centos/377514.html

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