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Welcome back to Day 26 of my #100DaysOfLinux challenge!
Today, you're not just reading — you're playing along ?.
We’re diving deep into essential Linux CLI tools:
? Table of Contents
? Step 1: Create Your Sample File
Before we jump into the challenges, let’s create a simple file with mixed log lines:
This file (file.txt) will be our playground today.Then check with cat file.txt.
? The Tools & Commands You’ll Use
Before the challenge, here's your weapon list:
? Challenge 1: grep Games
? Task:
?️
Challenge 2: Find It Like a Pro
? Task:
? Challenge 3: Head & Tail of the Story
? Task:
? Challenge 4: Count Me In (wc)
? Task:
? Bonus Challenge: Find the Unmatched Lines
? Task:
You have two config files: config.old and config.new.
Find which lines are in config.old but not in config.new.
? Hint:
grep -v -F -x -f config.new config.old
? Your Turn!
Pick any 3 challenges above and try them out in your terminal.
Then come back and drop a comment:
#30DaysLinuxChallenge #CloudWhisler
DevOps #Linux #RHCSA #Opensource #AWS #CloudComputing
Catch out by My LinkedIn profile
Today, you're not just reading — you're playing along ?.
We’re diving deep into essential Linux CLI tools:
Ready? Let’s go ?
? Table of Contents
- ? Step 1: Create Your Sample File
- ? Challenge 1: grep Games
- ?️ Challenge 2: Find It Like a Pro
- ? Challenge 3: Head & Tail of the Story
- ? Challenge 4: Count Me In (wc)
- ? Bonus Challenge: Find the Unmatched Lines
- ? Your Turn!
? Step 1: Create Your Sample File
Before we jump into the challenges, let’s create a simple file with mixed log lines:
This file (file.txt) will be our playground today.Then check with cat file.txt.
? The Tools & Commands You’ll Use
Before the challenge, here's your weapon list:
| Command | Purpose |
|---|---|
| grep | Pattern matching (search inside files) |
| find | Locate files and folders |
| head | Show beginning of files |
| tail | Show end of files |
| wc | Count words, lines, bytes |
? Challenge 1: grep Games
? Task:
- Find all lines that start with "ERROR".
- Find lines that end with "completed".
- Ignore case and search for "warning".
- Show lines that do not contain "INFO".
- Count how many times "404" appears.
?️
Challenge 2: Find It Like a Pro? Task:
- Find all .log files in /var/log.
- Find all .sh files modified in the last 2 days.
- Find all empty .txt files.
? Challenge 3: Head & Tail of the Story
? Task:
- Show the first 5 lines of a file.
- Show the last 15 lines.
- Watch a log file update live.
? Challenge 4: Count Me In (wc)
? Task:
- Count number of lines in a file.
- Count total words.
- Get line + word + byte count together.
? Bonus Challenge: Find the Unmatched Lines
? Task:
You have two config files: config.old and config.new.
Find which lines are in config.old but not in config.new.
? Hint:
grep -v -F -x -f config.new config.old
? Your Turn!
Pick any 3 challenges above and try them out in your terminal.
Then come back and drop a comment:
Which one did you complete?- ? Which one was hard?
- ? Which one was fun?
#30DaysLinuxChallenge #CloudWhisler
DevOps #Linux #RHCSA #Opensource #AWS #CloudComputing
Catch out by My LinkedIn profile