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This article is about how to use the syslog command in Linux. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

The Linux common command syslog is the default log daemon for the Linux system. The default syslog configuration file is the / etc/syslog.conf file. Programs, daemons and kernels provide log information to access the system. Therefore, any program that wants to generate log information can call the syslog interface to generate that information.

Default log daemon for syslog system

It is added that almost all network devices can transmit log information to the remote server by the way of user Datagram Protocol (UDP) through syslog protocol. The remote receiving log server must listen to UDP port 514 through syslogd, deal with the local machine according to the configuration in the syslog.conf configuration file, receive log information from the access system, and write specified events to specific files for background database management and response. This means that any event can be logged on to one or more servers in case the background database uses the off-line (offline) method to analyze events on remote devices.

Typically, syslog accepts information from a variety of functions of the system, each of which includes an important level. The / etc/syslog.conf file tells syslogd how to report information based on device and information importance.

Using the method to create and write log information in / var/log is handled by the syslog protocol and executed by the daemon sylogd. Every standard process can be logged using syslog. You can use the logger command to log through syslogd.

To log information to the syslog file / var/log/messages:

Logger this is a test log line output: tail-n 1 messages Jan 5 10:07:03 localhost root: this is a test log line if you want to record a specific tag (tag) you can use:

Logger-t TAG this is a test log line output: tail-n 1 messages Jan 5 10:37:14 localhost TAG: this is a test log line thank you for reading! This is the end of the article on "how to use syslog commands in Linux". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it for more people to see!

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