1. 备份原来的yum源
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
2. 下载阿里云的CentOS-Base.repo 到/etc/yum.repos.d/
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
或者
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
执行结果如下：
[root@localhost ~]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo --2019-05-07 07:52:44-- http://mirrors.aliyun.com/repo/Centos-7.repo Resolving mirrors.aliyun.com (mirrors.aliyun.com)... 183.245.11.231, 111.3.79.229, 183.245.11.232, ... Connecting to mirrors.aliyun.com (mirrors.aliyun.com)|183.245.11.231|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 2523 (2.5K) [application/octet-stream] Saving to: ‘/etc/yum.repos.d/CentOS-Base.repo’ 100%[=================================================================================>] 2,523 --.-K/s in 0s 2019-05-07 07:52:44 (84.8 MB/s) - ‘/etc/yum.repos.d/CentOS-Base.repo’ saved [2523/2523]
3. 清理缓存
sudo yum clean all
执行结果：
[root@localhost ~]# sudo yum clean all Loaded plugins: fastestmirror Cleaning repos: base epel extras updates Cleaning up list of fastest mirrors
4. 生成新的缓存
sudo yum makecache
执行结果：
[root@localhost ~]# sudo yum makecache Loaded plugins: fastestmirror Determining fastest mirrors epel/x86_64/metalink | 8.6 kB 00:00:00 * base: mirrors.aliyun.com * epel: mirrors.aliyun.com * extras: mirrors.aliyun.com * updates: mirrors.aliyun.com base | 3.6 kB 00:00:00 epel | 4.7 kB 00:00:00 extras | 3.4 kB 00:00:00 updates | 3.4 kB 00:00:00 (1/18): base/7/x86_64/group_gz | 166 kB 00:00:00 (2/18): base/7/x86_64/primary_db | 6.0 MB 00:00:00 (3/18): base/7/x86_64/filelists_db | 7.1 MB 00:00:01 (4/18): epel/x86_64/group_gz | 88 kB 00:00:00 (5/18): base/7/x86_64/other_db | 2.6 MB 00:00:00 (6/18): epel/x86_64/filelists_db | 11 MB 00:00:01 (7/18): epel/x86_64/updateinfo | 992 kB 00:00:00 (8/18): epel/x86_64/prestodelta | 955 B 00:00:00 (9/18): epel/x86_64/primary_db | 6.7 MB 00:00:00 (10/18): extras/7/x86_64/prestodelta | 62 kB 00:00:00 (11/18): extras/7/x86_64/filelists_db | 243 kB 00:00:00 (12/18): extras/7/x86_64/primary_db | 201 kB 00:00:00 (13/18): extras/7/x86_64/other_db | 126 kB 00:00:00 (14/18): epel/x86_64/other_db | 3.2 MB 00:00:00 (15/18): updates/7/x86_64/prestodelta | 623 kB 00:00:00 (16/18): updates/7/x86_64/filelists_db | 3.4 MB 00:00:00 (17/18): updates/7/x86_64/other_db | 563 kB 00:00:00 (18/18): updates/7/x86_64/primary_db | 4.2 MB 00:00:00 Metadata Cache Created
相关链接：