reliable system and kernel logging daemon

 Rsyslog is a multi-threaded implementation of syslogd (a system utility
 providing support for message logging), with features that include:
  * reliable syslog over TCP, SSL/TLS and RELP
  * on-demand disk buffering
  * email alerting
  * writing to MySQL or PostgreSQL databases (via separate output plugins)
  * permitted sender lists
  * filtering on any part of the syslog message
  * on-the-wire message compression
  * fine-grained output format control
  * failover to backup destinations
  * enterprise-class encrypted syslog relaying
 .
 It is the default syslogd on Debian systems.