Linux下的yum怎么升级？

bisal的个人杂货铺 2020-03-13

1158

Linux下我们安装软件，可能会需要安装各种包来支持，你可以从安装介质中找到rpm，手动安装，但最常用的，可能还是yum，省了很多烦恼。

但要知道yum同样需要升级，yum怎么升级？碰巧看到杨大师的一篇文章《LINUX环境下如何重建yum源并更新》，介绍了整个操作。

1. 备份默认的yum

# mv etc/yum.repos.d etc/yum.repos.d.backup

2. 设置新的yum目录

# mkdir etc/yum.repos.d

3. 下载阿里yum配置到该目录中，用wget，进行下载，

# yum install -y wget
# wget -O etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

4. 重建缓存

yum clean all执行效果，

[root@ethanyang 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: base centosplus extras updates
Cleaning up everything

yum makecache执行效果，

[root@ethanyang yum.repos.d]# yum makecache
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.
base                                                                                                            | 3.6 kB  00:00:00     
centosplus                                                                                                      | 2.9 kB  00:00:00     
extras                                                                                                          | 2.9 kB  00:00:00     
updates                                                                                                         | 2.9 kB  00:00:00     
(1/13): base/x86_64/group_gz                                                                                    | 165 kB  00:00:00     
(2/13): base/x86_64/filelists_db                                                                                | 7.3 MB  00:00:08     
(3/13): base/x86_64/primary_db                                                                                  | 6.0 MB  00:00:08     
(4/13): base/x86_64/other_db                                                                                    | 2.6 MB  00:00:02     
(5/13): centosplus/x86_64/filelists_db                                                                          | 1.2 MB  00:00:02     
(6/13): centosplus/x86_64/other_db                                                                              |  69 kB  00:00:00     
(7/13): centosplus/x86_64/primary_db                                                                            | 2.7 MB  00:00:03     
(8/13): extras/x86_64/filelists_db                                                                              | 216 kB  00:00:00     
(9/13): extras/x86_64/other_db                                                                                  | 106 kB  00:00:00     
(10/13): extras/x86_64/primary_db                                                                               | 164 kB  00:00:01     
(11/13): updates/x86_64/filelists_db                                                                            | 4.0 MB  00:00:03     
(12/13): updates/x86_64/other_db                                                                                | 493 kB  00:00:00     
(13/13): updates/x86_64/primary_db                                                                              | 6.7 MB  00:00:06     
Metadata Cache Created
[root@ethanyang yum.repos.d]#