Linux Administration - System logging

syslogd
Files 

/etc/syslog.conf	- syslogd configuration file
			
format: facility.priority	action
facility		- keyword for type of program ( auth(security), authpriv, cron daemon, kern, lpr, mail, mark, news, security, syslog, user, uucp, local0-local7 )
priority		- importance of message ( debug (lowest), info, notice, warning, warn, error, err, crit, alert, emerg, panic (highest)
			  ( warn (warning), error (err), panic (emerg) - deprecated, codes in () are respective equivalents) )
action			- file/location that accepts message (usually /var/log tree)

Other files:
/var/log/messages 	- syslogd log
/var/log/syslog 	- syslogd log
/var/log/dmesg 		- kernel ring buffer
/var/log/boot 		- Debian /dev/console messages from bootlogd
/var/log/boot.log 	- Fedora and Red Hat messages from syslogd

Commands 
 dmesg
Display system boot messages.

syslogd
System logger.

klogd
Kernel logger.

bootlogd
Debian daemon logger.

logrotate
Files 

/etc/logrotate.conf	- logrotate configuration file
/etc/logrotate.d	- placement for related files

Commands 
logrotate
Normally run via a cron entry.