syslog() generates a log message, which will be distributed by syslogd(8). The priority argument is formed by ORing the facility and the level values (explained below). The remaining arguments are a format , as in printf (3) and any arguments required by the format , except that the two character sequence %m will be replaced by the error message string strerror ( errno ).

auth/authpriv: security/authorization messages: cron: crond and atd daemons messages: daemon: other system daemons: kern: kernel messages: local0 – local7: reserved for local use: lpr: line printer subsystem: mail: mail subsystem: news: USENET news subsystem: syslog: messages generated internally by the system log daemon: user: generic user Dec 01, 2001 · syslog accepts log data from the kernel (by way of klogd), from any and all local processes, and even from processes on remote systems. It's flexible as well, allowing you to determine what gets logged and where it gets logged. A preconfigured syslog installation is part of the base operating system in virtually all variants of UNIX and Linux. The syslog.conf file is the configuration file for the syslogd(8) program. It consists of lines with two fields: the selector field which specifies the types of messages and priorities to which the line applies, and an action field which specifies the action to be taken if a message syslogd receives matches the selection criteria. May 31, 2017 · syslog Servers syslog servers run on remote systems that are configured to log system messages based on the syslog protocol. You can configure the Cisco Nexus 5000 Series to sends its logs to up to three syslog servers.

Syslog is an excellent tool for system monitoring and is almost always included in your distribution. However, the default setup is terrible. It will log all kinds of useless messages in weird places. I've included a really good configuration that should be great for most systems.

All messages arriving at syslog consider as Linux messages, and ignore local4 and local5 facilities which have their own templates. *.*;local4.none;local5.none :ommysql:localhost,Syslog,rsyslog-user,MySecretPassword;mysql_linux The following is an example of how the /etc/rsyslog.conf file could look on a syslog server with working templates:

How do I stop audit logs from going to /var/log/messages Currently we have auditd turned on and events are getting sent to /var/log/messages as well as /var/log/audit/audit.log All our logs go to a central syslog server also

Mar 20, 2019 · After the first article on syslog-ng, you should have a pretty good feel of how syslog-ng works. As you recall, the sources define what is logged, destinations determine where the logs go, and the log statements are what tells syslog-ng to create the log. However, much of the time we don’t want all of our system logs going to the same file. It can be quite useful to break up those logs in to