#2 Install & Configure Webmin on CentOS Stream 8

Installations Process:
1. touch /etc/yum.repos.d/webmin.repo
2. vi /etc/yum.repos.d/webmin.repo
add all lines
[Webmin]
name=Webmin Distribution Neutral
#baseurl=https://download.webmin.com/download/yum
mirrorlist=https://download.webmin.com/download/yum/mirrorlist
enabled=1
save & exit.
3.wget https://download.webmin.com/jcameron-key.asc
4. rpm –import jcameron-key.asc
5. yum install webmin
6. firewall-cmd –permanent –add-port=10000/tcp
7. firewall-cmd –reload

source

centos 7