Found this little gem while scouring the net.
These are files that store the information read and used by WHM (as of 11.23.6)
- IP addresses: /etc/ips
- Reserved IPs: /etc/reservedips
- Reserved IP reasons: /etc/reservedipreasons
- IP address pool: /etc/ipaddrpool
- Access hash (WHM remote access key): /home/user/.accesshash or /root/.accesshash
- cPanel update preferences: /etc/cpupdate.conf
- Basic cPanel/WHM setup: /etc/wwwacct.conf
- System mail preferences: /etc/localaliases
- Exim open relay list: /etc/alwaysrelay
- Server-wide max emails per hour: /var/cpanel/maxemailsperhour
- Tweak settings: /var/cpanel/cpanel.config
- Packages: /var/cpanel/packages/
- Features: /var/cpanel/features/
- User data: /var/cpanel/users/ and /var/cpanel/userdata
- Apache templates: /var/cpanel/templates/apache(1,2)
- Exim config template: /etc/exim.conf.localopts
- Exim mail IPs: /etc/mailips
- rDNS for mail ips: /etc/mail_reverse_dns
- Clustering: /var/cpanel/cluster/root/config
- Service manager: /etc/chkserv.d
- Users and their domains: /etc/userdomains
- Users and their main domains: /etc/trueuserdomains
- Users and their owners: /etc/trueuserowners
- Main cPanel IP: /var/cpanel/mainip
- cPanel version: /usr/local/cpanel/version
- Resellers: /var/cpanel/resellers
- Reseller nameservers: /var/cpanel/resellers-nameservers