System Logs (syslogd) and Performance Management
Error Messages and Log files are troubleshooter's best friend. Rahan
Reading and Understanding Log messages is most important duty of an System administrator
however nowadays its loosely done job.
Earlier Period processes/services have their own loggin mechanism, however now
because of the facilities provided by syslog daemon all most all but not all do use
the syslogd daemon to collect,store,filter,alert,forward the log data.
Main Configuration File /etc/syslog.conf, controls what to log and where to.
Two main parameters here
1) Selectors : What messages are to be logged
2) Action : What to do with it (means the destination of the log)\
Selector contains facility and levels
Action Where to send the message to console to file to remote host etc.