Following are the logs files on a cPanel server for different services:

Apache Logs:

/usr/local/apache/logs/access_log
/usr/local/apache/logs/error_log

Exim Logs:

/var/log/exim_mainlog
/var/log/exim_paniclog
/var/log/exim_rejectlog

Ftp Logs:

/var/log/messages

Mysql Logs:

/var/lib/mysql/server.hostname.err

ChkServd Logs:

/var/log/chkservd.log

Named (Bind) Logs:

/var/log/messages

Last logins to server:

/var/log/wtmp (but to view the details, execute the command “last”)

Domlogs of an Account:

/usr/local/apache/domlogs/domainname.tld

Mod Security Logs:

/usr/local/apache/logs/modsec_audit.log
/usr/local/apache/logs/modsec_debug_log

Apache SUEXEC Logs:

/usr/local/apache/logs/suexec_log

cPanel Access and Error Logs:

/usr/local/cpanel/logs/access_log
/usr/local/cpanel/logs/error_log

Stats Logs:

/usr/local/cpanel/logs/stats_log

cPanel License Logs:

/usr/local/cpanel/logs/license_log

cPanel Backup Logs:

/usr/local/cpanel/logs/cpbackup/*.log

Tomcat Logs:

/usr/local/jakarta/tomcat/logs/catalina.err
/usr/local/jakarta/tomcat/logs/catalina.out