syslogd daemon in Linux

syslogd  daemon Handles logging in Linux
Some Features of syslogd :

1. Unix Domain Sockets (/dev/log)
2. Internet Sockets (UDP:514)
3. Ability to log to local and remote targets

Implemented as 'sysklogd' package
Primary configuration file: /etc/syslog.conf
Standard syslog.conf file contains:
1. Rules (Types of Log and Applications)
a.facilities  -> applications/daemons/network device/etc.
b. levels  -> Importance of message
Range: 0-7

• 7 = emergency (less information)
• 6 = alert
• 5 = critical
• 4 = error
• 3 = warning
• 2 = notice
• 1 = info
• 
  
  0 = debug (more information)

2. Targets (Destination of Logs)
a. file - /var/log/messages
b. tty - /dev/console
c. remote hosts - @IP_ADDR_of_REMOTE_HOST  (for remote logging)
'*' = catchall/wildcard to mean any facility or level
'.none' = exclusion rule
'man syslog.conf' to learn about the support facilities and Levels