yum command prompt 404

An exception occurred while using the command yum

failure: repodata/repomd.xml from testing-devtools-2-centos-7: [Errno 256] No more mirrors to try. http://people.centos.org/tru/devtools-2/7/x86_64/RPMS/repodata/repomd.xml: [Errno 14] HTTPS Error 404 - Not Found

 

1 Network confirmed that no problem ~

This folder is not 7 2 tests found http://people.centos.org/tru/devtools-2 URL

　　[Processing] - yum replacement source:

　　　　a yum configuration file into the folder: cd /etc/yum.repos.d

　　　　b Backup Source: mv ./CentOS-Base.repo ./CentOS-Base.repo.bak

　　　　c Download source: wget http://mirrors.163.com/.help/CentOS-base-163.repo    

　　　　d as the default entry: mv CentOS6-Base-163.repo CentOS-Base.repo

　　　　e generated cache: yum clean all

　　　　　　　　　　　　yum makecache

yum makecache 404 anomalies still occur . . . . . . . . . . . . . . . . Found this  https://blog.csdn.net/zhou920786312/article/details/80051318

Will greatly thank ~~~/etc/yum.repos.d文件夹下 devtools-2.repo 后缀名改为   devtools-2.Beirepo 后运行yum命令 404异常消失

　　But tips    

　　/var/run/yum.pid is locked, PID solve the problem xxxx is another program running

　　[Processing] - Run  rm -f /var/run/yum.pid

Rebuild the cache --- run successfully! !