Execute the command under CentOS 7.6 64 bit: yum makeCache, report an error: There are no enabled repos

1. Execute the command in CentOS 7.6 64-bit: yum makeCache to update the cache of the yum source, and report an error: There are no enabled repos, as shown in Figure 1

Figure 1

[root@iZ8vb0tg9av3a17vlbfi28Z ~]# yum makecache
loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
There are no enabled repos.
Run "Yum repoliist all" to see the repos you have.
To enable red hats
subscription-manager repos --enable <repo>
To enable custom repositories:
yum-config-manager --enable <repo>

2. Decided to reinstall the 7.6 release package, first go to the Alibaba Yunyuan website, find the corresponding release package, and copy its link, as shown in Figure 2

Figure 2

3. Execute the following commands in sequence, as shown in Figure 3

Figure 3

wget https://mirrors.aliyun.com/centos/7.6.1810/os/x86_64/p ackages/centos-release-7-6.1810.2.el7.centos.x86_64.rpm
rpm -ivh --replacepkgs --replacefiles centos-release-7-6.1810.2.el7.centos.x86_64.rpm
yum update

4. Execute the command: yum makeCache to update the cache of the yum source, no errors are reported, and it is in line with expectations, as shown in Figure 4

Figure 4

[root@iZ8vb0tg9av3a17vlbfi28Z ~]# yum makecache
loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.tuna.tsinghua.edu.cn
* Extras: Mirrors.HuaWeiCloud.com
* updates: mirrors.huaweiicloud.com
BASE | 3.6 KB 00:00
Extras | 3.4 KB 00:00
Updates | 3.4 KB 00:00
(1/8): Extras/7/x86_64/prestodelta | 47 KB 00:00
(2/8): EXTRAS/7/X86_64/Filelists_DB | 231 KB 00:00
(3/8): EXTRAS/7/X86_64/OTHER_DB | 118 KB 00:00
(4/8): Updates/7/X86_64/PresToDelta | 358 KB 00:00
(5/8): updates/7/x86_64/other_db | 351 KB 00:00
(6/8): updates/7/x86_64/filelists_db | 2.2 MB 00:00
(7/8): base/7/x86_64/other_db | 2.6 MB 00:00
(8/8): base/7/x86_64/filelists_db | 7.1 MB 00:04
metadata cache created