Bash File Log Analyzer

Description

This script is a Bash-based log file analyzer that provides functionality to:

• Aggregate log file data (e.g., log level counts and message frequency).
• Perform temporal analysis of log activity.

Credits

Script author: 4t0m ＼(^o^)／

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Features

1. Aggregate Logs:
   Analyzes log levels (trace, debug, info, warn, error, fatal) and identifies the most and least common log messages.

2. Temporal Analysis:
   Identifies the most active day, hour, and the hour with the highest error frequency.

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Usage

./script_name.sh [Argument] <logfile>

Arguments:

• aggregate - Perform aggregation analysis of the log file.
• temporal_analysis - Analyze the temporal activity of logs.

Examples:

1. Aggregate Analysis:

   ./script_name.sh aggregate example.log

   Output:

   =-= Aggregating file example.log =-=
   
   Log level counts:
    - trace: 10
    - debug: 5
    - info: 20
    - warn: 2
    - error: 1
    - fatal: 0
   
   Most common message: "User login" (count: 15)
   Least common message: "System rebooted" (count: 1)
   
   =-= End of report =-=
   ¯\_(ツ)_/¯
   

2. Temporal Analysis:

   ./script_name.sh temporal_analysis example.log

   Output:

   =-= example.log temporal analysis =-=
   
   Most active day: Monday
   Most active hour: 14
   Most error-prone hour: 22
   
   =-= End of report =-=
   

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Requirements

• Bash shell
• grep, awk, sed, sort, bc, date,head,uniq,tail,cut,xargs

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Error Handling

1. No Arguments Provided: If the script is executed without arguments:

   ./script_name.sh

   Output:

   ʕ•ᴥ•ʔ
   Error: No argument provided after the file.
   
   Usage: ./script_name.sh [Argument] <logfile>
   

2. Missing Log File: If a log file is not specified:

   ./script_name.sh aggregate

   Output:

   Error: log file not specified
   

3. Unknown Command: If an unsupported command is entered:

   ./script_name.sh unknown example.log

   Output:

   Error: Unknown command 'unknown'.
   

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Happy analyzing!
¯_(ツ)_/¯