Difference between revisions of "Logs (Linux)"

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See also https://stackoverflow.com/questions/30969435/where-is-the-docker-daemon-log/30970134#30970134 for further information about docker logs.
 
See also https://stackoverflow.com/questions/30969435/where-is-the-docker-daemon-log/30970134#30970134 for further information about docker logs.
 
* <code>[[docker container logs]]</code>
 
* <code>[[docker container logs]]</code>
 +
* <code>[[docker run]] -d --[[log-driver]]=[[journald]] YOUR_CONTAINER</code>
  
 
== See also ==
 
== See also ==

Revision as of 06:10, 14 June 2020

Linux logs are save usually in /var/log folder. Most linux distribution uses syslog, syslog-ng or rsyslog software for logging or sending them to remote servers. Analytics and visualisation software such a Elasticsearch and Kibana can be used for log inspection.

Usage by Distribution:

Standard logs:

  • Debian/Ubuntu: /var/log/syslog
  • RHEL/Fedora: /var/log/message

SSH sessions logging:

  • Debian/Ubuntu: /var/log/auth.log
  • RHEL/Fedora: /var/log/secure

Misc:

  • SUSE: /var/log/warn.log
/var/log/message – Where whole system logs or current activity logs are available.
/var/log/auth.log – Authentication logs.
/var/log/kern.log – Kernel logs.
/var/log/cron.log – Crond logs (cron job).
/var/log/maillog – Mail server logs.
/var/log/boot.log – System boot log.
/var/log/mysqld.log – MySQL database server log file.
/var/log/secure – Authentication log.
/var/log/utmp or /var/log/wtmp : Login records file.
/var/log/yum.log: Yum log files.


Rsyslog

Rsyslogd supports queued operations to handle offline outputs. Official documentation: https://www.rsyslog.com/doc/v8-stable/configuration/index.html

Rsyslog Configuration

Default configuration files by Distribution:

Docker

See also https://stackoverflow.com/questions/30969435/where-is-the-docker-daemon-log/30970134#30970134 for further information about docker logs.

See also

Text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Source: https://en.wikiversity.org/wiki/Linux/logging

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