- /var/log/messages : General message and system related stuff
- /var/log/exim_mainlog : Exim Mail logs
- /var/log/maillog : Mail server logs
- /usr/local/apache/logs/error_log : Apache Logs (cPanel)
- /var/log/httpd/ : Apache error logs (non Cpanel)
- /var/log/auth.log : Authenication logs
- /var/log/kern.log : Kernel logs
- /var/log/cron.log : Crond logs (cron job)
- /var/log/qmail/ : Qmail log directory (more files inside this directory)
- /var/log/mysqld.log : MySQL database server log file
/var/log/secure or /var/log/auth.log : Authentication log
You can view these logs using the cat command. This will output the contents of the log file onto your screen:
$ cat /var/log/messages
You can also use the tailf to "follow" the output as it is appended to the log file:
$ tailf /var/log/message