cPanel Log files

cPanel: /usr/local/cpanel/logs directory

access_log – cPanel access log for both cPanel and WHM
error_log – cPanel error log
license_log – cPanel license log
login_log – cPanel user login log
melange.log – cPanel chat server log
melange_msg.log – cPanel chat server message log
stats_log – cPanel web stats log

System: /var/log/ directory.

bandwidth – cPanel total bandwidth logs for the entire server
chkservd.log – chkservd service log
clamav – clamav log directory
cpupdate.log – cPanel update log
exim_mainlog – Exim email transaction log
exim_paniclog – Exim error log
exim_rejectlog – Exim rejected email log
maillog – Transaction and login log for all mail services
messages – Transaction and login log for FTP services

cPanel individual domain logs: /usr/local/apache/domlogs

The log file will show the access log for each domain.