Hi,
Basically you can install redis by following wiki here https://www.litespeedtech.com/support/wiki/doku.php/litespeed_wiki:cache:redis
yum install epel-release -y
yum install redis -y
systemctl start redis
rpm -ivh http://rpms.litespeedtech.com/centos/litespeed-repo-1.1-1.el8.noarch.rpm...