2-9 Redhat 7安裝CentOS 7 yum源
由於redhat 的更新包只對註冊的使用者生效，所以需要自己手動更改成CentOS 的更新包，
CentOS幾乎和redhat是一樣的，所以無需擔心軟體包是否可安裝，下面是安裝步驟。
1、首先檢視redhat 7.0系統本身所安裝的那些yum 軟體包：
[[email protected] ~]# rpm -qa | grep yum
yum-utils-1.1.31-24.el7.noarch
yum-langpacks-0.4.2-3.el7.noarch
yum-metadata-parser-1.1.4-10.el7.x86_64
yum-rhn-plugin-2.0.1-4.el7.noarch
PackageKit-yum-0.8.9-11.el7.x86_64
yum-3.4.3-118.el7.noarch
2、解除安裝這些軟體包；
[[email protected] ~]# rpm -e yum-3.4.3-118.el7.noarch --nodeps
[[email protected] ~]# rpm -e yum-utils-1.1.31-24.el7.noarch --nodeps
[[email protected] ~]# rpm -e yum-rhn-plugin-2.0.1-4.el7.noarch --nodeps
[[email protected] ~]# rpm -e yum-metadata-parser-1.1.4-10.el7.x86_64 --nodeps
[[email protected] ~]# rpm -e yum-langpacks-0.4.2-3.el7.noarch --nodeps
[[email protected] ~]# rpm -e PackageKit-yum-0.8.9-11.el7.x86_64 --nodeps
3、保證本機電腦能上網；
[[email protected] ~]# ping www.baidu.com
PING www.a.shifen.com (163.177.151.110) 56(84) bytes of data.
64 bytes from 163.177.151.110: icmp_seq=1 ttl=49 time=13.1 ms
64 bytes from 163.177.151.110: icmp_seq=2 ttl=49 time=6.80 ms
64 bytes from 163.177.151.110: icmp_seq=3 ttl=49 time=6.77 ms
^C
--- www.a.shifen.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2007ms
rtt min/avg/max/mdev = 6.777/8.917/13.168/3.006 ms
4、下載連結：https://pan.baidu.com/s/1aN8ZJBZpRlNkJHUHzDfWHA
不報錯版本安裝包：
yum-3.4.3-132.el7.centos.0.1.noarch.rpm
yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
yum-plugin-fastestmirror-1.1.31-34.el7.noarch.rpm
yum-updateonboot-1.1.31-34.el7.noarch.rpm
yum-utils-1.1.31-34.el7.noarch.rpm
5、安裝軟體包：[[email protected] ~]# rpm -ivh yum-*
warning: yum-3.4.3-132.el7.centos.0.1.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
Preparing... ################################# [100%]
Updating / installing...
1:yum-metadata-parser-1.1.4-10.el7 ################################# [ 20%]
2:yum-plugin-fastestmirror-1.1.31-3################################# [ 40%]
3:yum-3.4.3-132.el7.centos.0.1 ################################# [ 60%]
4:yum-updateonboot-1.1.31-34.el7 ################################# [ 80%]
5:yum-utils-1.1.31-34.el7 ################################# [100%]
[[email protected] ~]#
安裝完成！！！
6、新建repo 配置檔案；
[[email protected] ~]# vim /etc/yum.repos.d/CentOS-Base.repo
#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-$7 - Base - 163.com
#mirrorlist=http://mirrorlist.centos.org/?release=$7&arch=$basearch&repo=os
baseurl=http://mirrors.163.com/centos/7/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
#released updates
[updates]
name=CentOS-$7 - Updates - 163.com
#mirrorlist=http://mirrorlist.centos.org/?release=$7&arch=$basearch&repo=updates
baseurl=http://mirrors.163.com/centos/7/updates/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
#additional packages that may be useful
[extras]
name=CentOS-$7 - Extras - 163.com
#mirrorlist=http://mirrorlist.centos.org/?release=$7&arch=$basearch&repo=extras
baseurl=http://mirrors.163.com/centos/7/extras/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$7 - Plus - 163.com
baseurl=http://mirrors.163.com/centos/7/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
7、清除快取：
[[email protected] ~]# yum clean all
Loaded plugins: fastestmirror, product-id, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
Cleaning repos: base extras updates
Cleaning up everything
8、測試安裝是否正常；
[[email protected] ~]# yum -y install lftp
Loaded plugins: fastestmirror, product-id, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
base | 3.6 kB 00:00:00
extras | 3.4 kB 00:00:00
updates | 3.4 kB 00:00:00
(1/4): extras/x86_64/primary_db | 139 kB 00:00:00
(2/4): base/x86_64/group_gz | 155 kB 00:00:00
(3/4): updates/x86_64/primary_db | 3.9 MB 00:00:01
(4/4): base/x86_64/primary_db | 5.6 MB 00:00:02
Determining fastest mirrors
Resolving Dependencies
--> Running transaction check
---> Package lftp.x86_64 0:4.4.8-8.el7_3.2 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
=======================================================================================================================
Package Arch Version Repository Size
=======================================================================================================================
Installing:
lftp x86_64 4.4.8-8.el7_3.2 updates 751 k
Transaction Summary
=======================================================================================================================
Install 1 Package
~~~~~此處省略安裝輸出內容~~~~
Installed:
lftp.x86_64 0:4.4.8-8.el7_3.2
Complete!
到這裡安裝完成，以後安裝所需包，可以不用本地yum源了，直接使用網路yum源。