1.Root cause: CentOS 8 - End of updates by late 2021.
2.Error screenshot:
3.Error keywords:
Failed to synchronize cache for repo 'AppStream', ignoring this repo.
Note: Unable to synchronize the cache for 'AppStream' repo, ignoring this repo.
Failed to synchronize cache for repo 'BaseOS', ignoring this repo.
Note: Unable to synchronize the cache for 'BaseOS' repo, ignoring this repo.
Last metadata expiration check: 0:45:16 ago on Thu Jul 7 19:20:18 2022.
Note: Last metadata expiration check: 0:45:16 before Thursday, July 7, 2022, 19:20:18.
No match for argument: wget
Note: Parameter mismatch: wget.
Error: Unable to find a match
Note: Error: No match found.
4.Solution:
sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*
Execute the adjustments one by one, and then you should be able to use Dnf or Yum.
Note: To fix the above error, we need to use the following command to change the repo URL pointing to the CentOS official URL to vault.centos.org
If the above is not working, you can use the following command (Aliyun mirror):
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo
yum makecache
