rsyslog: Fast rsyslogd application that quickly became standard logging package for Linux distributions.syslogd-ng: Added advanced features to sysklogd.sysklogd: Original syslog application which included two programs: syslogd to monitor for system and application events and klogd program to monitor for kernel events.Over the years, there were multiple logging projects for Linux systems: Another example, if you find that auth facility generated info severity code, then you know that something has happened with authentication on the system. So, if your syslog protocol generates facility mail and severity alert, then you know something horrific has happened with mail service. Normal but significant message explaining bad condition Not-normal warning condition in the system or application Here are seven severity codes syslog protocol is using: 0Įvent that is critical but doesn’t require immediate attentionĮrror that allows system or application to continue This puts each facility the severity or importance code that explains how serious the problem is, is it informational log message, is it critical, is it a warning, etc. Messages from system applications (services)Īlso, as we mentioned, each facility has a severity code with it. Both of these codes are explained in detail: 0 The syslog protocol is separating messages to facility and severity codes. The syslog protocol is a standard for logging system events and application events.
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