作為一名新手，學習Linux已經一個月了，其間遇到了不少問題，而今天筆者遇到的問題是

#yum install pam-devel

#This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.Setting up Install ProcessNothing to do

經過一個上午的研究發現，其實如果使用redhat的yum源需注冊付費，費時費力，況且我僅僅只是一個初學者，只在自己電腦上搭了個redhat系統而已，沒必要為此大費周章。通過度娘發現了很多解決辦法，但很多辦法在我電腦上行不通，才知道廣大網友的環境是不一樣的，所以他們的辦法不一定符合自己的電腦。

下面是筆者結合網上的相關資料，針對與我相同環境的系統的解決辦法。

系統：RedHat Enterprise Linux 6.4-x86_64 md5:467B53791903F9A0C477CBB1B24FFD1F 這是下載地址：http://pan.baidu.com/s/1bniVAMj

第一步下載相關安裝包

可以通過http://mirrors.163.com/centos下載，這是筆者已經下載好的http://pan.baidu.com/s/1qW0MbgC

第二步卸載Redhat自帶的yum

#rpm -qa | grep yum | xargs rpm -e --nodeps

第三步安裝下載的安裝包

#rpm -ivh python-iniparse-0.3.1-2.1.el6.noarch.rpm

#rpm -ivh yum-metadata-parser-1.1.2-16.el6.x86_64.rpm

#rpm -ivh yum-3.2.29-40.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm

第四步到http://mirrors.163.com的 centos幫助文檔 中下載CentOS6-Base-163.repo文件，存放到/etc/yum.repo.d中

#wget http://mirrors.163.com/.help/CentOS6-Base-163.repo

第五步將Centos6-Base-163.repo中的$releasever改為Centos的版本號即可

為了防止錯誤，也可使用我已修改好的文件http://pan.baidu.com/s/1o6AZ23o

文件修改成如下即可：

# CentOS-Base.repo

#

# The mirror system uses the connecting IP address of the client and the

# update status of each mirror to pick mirrors that are updated to and

# geographically close to the client. You should use this for CentOS updates

# unless you are manually picking other mirrors.

#

# If the mirrorlist= does not work for you, as a fall back you can try the

# remarked out baseurl= line instead.

#

#

[base]

name=CentOS-6 - Base - 163.com

baseurl=http://mirrors.163.com/centos/6/os/$basearch/

#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=os

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#released updates

[updates]

name=CentOS-6 - Updates - 163.com

baseurl=http://mirrors.163.com/centos/6/updates/$basearch/

#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=updates

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#additional packages that may be useful

[extras]

name=CentOS-6 - Extras - 163.com

baseurl=http://mirrors.163.com/centos/6/extras/$basearch/

#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=extras

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-6 - Plus - 163.com

baseurl=http://mirrors.163.com/centos/6/centosplus/$basearch/

#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=centosplus

gpgcheck=1

enabled=0

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#contrib - packages by Centos Users

[contrib]

name=CentOS-6 - Contrib - 163.com

baseurl=http://mirrors.163.com/centos/6/contrib/$basearch/

#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=contrib

gpgcheck=1

enabled=0

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

第六步 yum clean all 清除原有緩存

第七步 yum makecache 獲取yum列表

等待，大約三分鐘后出現下面提示，表示yum更改完成：

Metadata Cache Created