Cybersecdn-There are different kinds of logs that you need to keep an eye on to find out what is going on with your computer. These include firewall, network or NetFlow, DNS, system, application, vulnerability scans, authentication, dump files, and VoIP. In the world of espionage, Syslog is a standard for keeping logs.
The four parts of a syslog message are the header, which has a timestamp and a source address, the facility, which is the source message on the sending system, the severity, which is a number between 0 and 7 that shows how important the message is, and the message itself, which describes what happened that caused the syslog to be shown.
0 is an emergency, 1 is an alert, 2 is important, 3 is an error, 4 is a warning, 5 is just a notice, 6 is informational, and 7 is just a debug. Logs show that problems are getting worse as the number goes down.
But Syslog isn’t used very often on new computers because it’s not the original standard for system logs. The 1998 version of syslog-ng made improvements to security and delivery. It got better than the standards that came before when Rsyslog added more improvements to the system logging method in 2004. The binary journal file is used by journalctl, a syslog script. If you want to quickly go through logs, you should tag them and hold on to them for a certain amount of time.