Important log paths on whm server:
1. Exim main log: /var/log/exim_mainlog
2. Apache access log: /usr/local/apache/logs/access_log
3. Apache error log: /usr/local/apache/logs/error_log (All exceptions caught by apache along with standard error output from CGI applications)
4. SSH Logins are in /var/log/secure
5. FTP Logins are in: /var/log/messages
6. POP/IMAP logins are in: /var/log/maillog
7. Mod_security log: /etc/httpd/logs/audit_log (may depend on installation)
8. Domain Access Logs: /usr/local/apache/domlogs/domain.com (General access log file for each domain configured with cPanel)
9. MySQL General Information and Errors: /var/lib/mysql/$(hostname).err (This path could vary, but is generally located in /var/lib/mysql.Could also be located at /var/log/mysqld.log)