Solves the issue related to the three exclamation points of yum update in CentOS.

Solves the issue related to the three exclamation points of yum update in CentOS.

This log records problems encountered during CentOS usage. After more than an hour of exploration, there is still no clue about the problem.

Question 1: three exclamation points in yum update

[Root @ localhost ~] # Yum update
Loaded plugins: fastestmirror, langpacks, priorities
Base | 3.6 kB
Elrepo | 2.9 kB: 00
Epel/x86_64/metalink | 5.7 kB
Epel | 4.3 kB: 00
Extras | 3.4 kB: 00
Google-chrome | 951 B: 00
Librehat-shadowsocks | 3.0 kB: 00
Nux-dextop | 2.9 kB: 00
Rpmforge | 1.9 kB: 00
Updates | 3.4 kB: 00
Virtualbox/7/x86_64/signature | 198 B
Virtualbox/7/x86_64/signature | 951 B !!!
(1/3): epel/x86_64/updateinfo | 493 kB
(2/3): extras/7/x86_64/primary_db | 101 kB
(3/3): epel/x86_64/primary_db | 3.9 MB: 02
Google-chrome/primary | 1.8 kB: 00
Loading mirror speeds from cached hostfile
* Base: mirrors.aliyun.com
* Elrepo: ftp.yz.yamagata-u.ac.jp
* Epel: mirrors.hustunique.com
* Extras: mirrors.163.com
* Nux-dextop: li. nux. ro
* Rpmforge: mirrors.neusoft.edu.cn
* Updates: mirrors.neusoft.edu.cn
Google-google chrome 3/3
651 packages excluded due to repository priority protections
No packages marked for update

This is encountered during the yum update process. Why is virtualbox/7/x86_64/signature downloaded twice and there are three exclamation points after the second update?

It seems to be a gpgcheck problem, but there are two related items in the virtualbox repo file: gpgcheck = 1, and repo_gpgcheck = 1.

At the same time, the page pointed to in the virtualbox. repo file does not find the file with the size of 198B or 951B.