CPanel stores it’s log files in the /usr/local/cpanel/logs directory. Below is a list of the common log files that are located in a cPanel server along with a short description.
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
Also cPanel keeps other system logs in the /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
pgsql — PostgreSQL log file
cPanel keeps the domain weblogs in the /usr/local/cpanel/domlogs directory for each domain name that is hosted on the server. This includes FTP transfer logs for each account.