log management

Common Logs

/var/log/messages – General message and system related stuff
/var/log/auth.log – Authenication logs
/var/log/kern.log – Kernel logs
/var/log/cron.log – Crond logs (cron job)
/var/log/maillog – Mail server logs
/var/log/qmail/ – Qmail log directory (more files inside this directory)
/var/log/httpd/ – Apache access and error logs directory
/var/log/lighttpd – Lighttpd access and error logs directory
/var/log/boot.log – System boot log
/var/log/mysqld.log – MySQL database server log file
/var/log/secure – Authentication log
/var/log/utmp or /var/log/wtmp – Login records file
/var/log/yum.log – Yum log files
/usr/local/psa/var/log/maillog – maillogs in plesk
tail -f /usr/local/psa/var/log/maillog – maillogs in plesk
/var/qmail/bin/qmail-qstat – view mail queue

/var/log/dmesg.old
/var/log/mysqld
/var/www/vhosts/*/statistics/logs/access_log

cat /var/log/messages
tail -f /var/log/messages
less /var/log/messages
more -f /var/log/messages
vi /var/log/messages