Getting Plex Media Server working under EL7 is an absolute breeze. Here are the steps needed to get your own server up and rocking.

TO INSTALL

This is getting PMS installed via my yum repository.

    sudo yum install https://schotty.com/yum/plex_el7/schotty-plex-el7-release-1-1.noarch.rpm
    sudo yum makecache
    sudo yum install plexmediaserver

FIX THE FIREWALL TO ALLOW PMS

    sudo firewall-cmd --permanent --add-port=32400/tcp
    sudo firewall-cmd --reload

CREATE PLEX SYSTEM GROUP

This is at your discretion as to what to name it, but you will need a dedicated plex group. Ensure that your media folder(s) have group ownership of this media group account.

    sudo groupadd media
    sudo usermod -G media plex
    sudo usermod -G media YOUR-PRIMARY-USER

ENABLE AND START PMS DAEMON

    sudo systemctl enable plexmediaserver
    sudo systemctl start plexmediaserver

LOGIN & CONFIGURE

Then in a browser navigate to your server in web browser:

    http://IP_OR_DOMAIN_NAME:32400/webindex.html

Then proceed to configure Plex as you see fit.

TROUBLESHSOOTING