Advanced Logging and Troubleshooting Techniques
Explore system logs, use `journalctl`, and apply systematic approaches to troubleshoot complex problems.
Why Logs Matter
When something goes wrong on a Linux system, logs are your best friend! They are like a digital diary that records events and activities.
System logs help you understand what happened, when it happened, and often, why it happened. This information is crucial for fixing problems and maintaining system health.
The `/var/log` Directory
Traditionally, most system logs are stored in the /var/log directory. You'll find many files here, each typically dedicated to a specific service or type of event.
auth.log: Records authentication attempts.syslog: General system activity messages.kern.log: Messages from the Linux kernel.
It's a treasure trove of information, but navigating it can be complex.
All lessons in this course
- Disk I/O Monitoring: `iostat`, `iotop`
- Memory and CPU Performance Tools
- Advanced Logging and Troubleshooting Techniques
- Tracing System Calls with strace and ltrace