yum的全稱為Yellow dog Updater,Modified,是一個基於RPM的shell前端包管理器，能夠從指定伺服器上（一個或者多個）自動下載並安裝或更新軟體、刪除軟體。其最大的好處就是能解決依賴關係

一、本地yum源配置

1.虛擬機器搭建所需環境

[[email protected] Desktop]# mkdir /ios
[[email protected] Desktop]# mount /dev/cdrom /ios/
mount: /dev/sr0 is write-protected, mounting read-only
[
 
[email protected] Desktop]# df
Filesystem            1K-blocks    Used Available Use% Mounted on
/dev/mapper/rhel-root   9754624 2972192   6782432  31% /
devtmpfs                 926516       0    926516   0% /dev
tmpfs                    942060     420    941640   1% /dev/shm
tmpfs                    942060    8996    933064   1% /run
tmpfs                    942060       0    942060   0% /sys/fs/cgroup
/dev/sda1                201388  145464     55924  73% /boot
tmpfs                    188412       4    188408   1% /run/user/42
tmpfs                    188412       8    188404   1% /run/user/0
/dev/sr0                3947824 3947824         0 100% /ios
 

注意：之所以新建掛載目錄是因為yum指令無法識別空格符，因為掛在的映象名字有空格符。

2.配置yum檔案

[[email protected] Desktop]# cd /etc/yum.repos.d/
[[email protected] yum.repos.d]# ls
redhat.repo
[[email protected] yum.repos.d]# vim rhel.repo
[[email protected] yum.repos.d]# yum clean all
Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-
              : manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
Cleaning repos: rhel7.2
Cleaning up everything
[
 
[email protected] yum.repos.d]# yum repolist 
Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-
              : manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
rhel7.2                                                  | 4.1 kB     00:00     
(1/2): rhel7.2/group_gz                                    | 136 kB   00:00     
(2/2): rhel7.2/primary_db                                  | 3.6 MB   00:00     
repo id                              repo name                            status
rhel7.2                              rhel7.2                              4,620
repolist: 4,620

注意：以上的yum源頭配置都為臨時間配置

3.永久配置yum源

[[email protected] Desktop]# vim /etc/rc.d/rc.local 
[[email protected] Desktop]# reboot 

 

真機中配置yum源直接將映象掛載到掛載目錄，重複以上即可。

二、網路yum源的搭建

1.搭建實驗所需要環境(真機中搭建)

安裝Apache

2.重新搭建本機的yum 源配置

[[email protected] ~]# mkdir /var/www/html/rhel7.2
[[email protected] ~]# mount /ios/rhel-server-7.2-x86_64-dvd.iso /var/www/html/rhel7.2
mount: /dev/loop0 is write-protected, mounting read-only
[[email protected] ~]# vim /etc/yum.repos.d/junzi.repo 
[[email protected] ~]# vim /etc/yum.repos.d/rhel7.2.repo 
[[email protected] ~]# vim /etc/rc.d/rc.local 
[[email protected] ~]# systemctl restart httpd

3.製作火牆策略

[[email protected] ~]# firewall-cmd --permanent --add-service=http
success
[[email protected] ~]# firewall-cmd --permanent --add-masquerade 
success

 

4.客戶端作測試

搭建成功 更改客戶端yum源配置檔案