Configure the epel source in Linux to realize the running map of the small train.
The first rpm source package with epel source (you can get it by private chat with the public number)
cd /etc/yum.repos.d/ into the file
ls to see if there is aliyu.repo
rz upload rpm source package
ls to see if the upload was successful
rpm -ivh epel-release-latest-7.noarch.rpm install epel
ls /etc/yum.repos.d/ Check whether the epel source is installed successfully
cat /etc/yum.repos.d/epel.repo to view the internal files of epel.repo
yum ins t all -ys l install sl command
sl Execute this command to realize the running map of the small train