CLH-005

Log Analysis

< Script House
operator@shadow:~
[SYSTEM] Log analysis module activated
[ALERT] System logs contain error entries requiring investigation
> Mission: Analyze system logs and identify error patterns
Type help to see available commands.
operator@shadow:~$

CURRENT OBJECTIVE

LOG ANALYSIS BRIEFING

The Mission

System logs are the flight recorder of any computer. They capture every significant event - both normal operations and problems.

Your objective: Find and document all error entries in the captured system logs.

Log Severity Levels

ERROR - Critical issues
WARN - Potential problems
INFO - Normal events
DEBUG - Verbose details

Step 1: Navigate to Logs

$ ls
List directories (find logs folder)
$ cd logs
Enter the logs directory

Step 2: Preview the Log

$ head system.log
View first 10 lines
$ tail system.log
View last 10 lines

Step 3: Search with grep

$ grep "ERROR" system.log
Find all ERROR entries
$ grep -c "ERROR" system.log
Count matching lines (returns a number)
ANALYST NOTE:

Real system logs can contain thousands of entries. Learning to filter with grep is essential for efficient log analysis.

PRO TIP:

Use grep -in to get case-insensitive search with line numbers.