需要 CentOS 8 ，用 root 執行：
cd /etc/yum.repos.d/
wget https://download.opensuse.org/repositories/systemsmanagement:Uyuni:Master:TEST:1:CR:CentOS8-Uyuni-Client-Tools/CentOS_8/systemsmanagement:Uyuni:Master:TEST:1:CR:CentOS8-Uyuni-Client-Tools.repo
yum install salt