⣿ ZOTHOS × 1NC0GN30 30 DAYS OF LINUX FUNDAMENTALS · TUI (./control-panel) + WEB GUI · 90 MISSIONS
1nc0gn30.si ↗ ZothOS v3.4 ↗ ZothOS-Lite ↗ GitHub Repo ↗
← Back to 30-Day Curriculum

WEEK 4 · ADVANCED OPS · TUI: ./control-panel --day 23

Day 23: Parameterized CLI Scripts, Getopts & Tooling

Parse CLI flags with getopts, validate inputs, and build modular command-line utilities.

XP 0
Streak 0
Command Mastery 0%
Study Music

YouTube Study Radio

Pick a track or paste any YouTube URL.

🍳 Breakfast (Syntax) Session

Type commands, build streaks, and then review the source guide.

Live Terminal Drill

Re-type the command exactly to clear each challenge.

target$ loading...

0 / 12 mastered

    Command Board

    Tap a command when you practiced it in your own terminal.

    Command Intel

    Meaning

    Command explanation will appear here.

    Sample Output

    Output preview will appear here.

    Useful Fun Fact

    Fun facts about the active command will appear here.

    Last Run Output

    Run a command to see result feedback.

    Knowledge Boost

    Faster learning with topic cues, mini-missions, and external docs.

    Key Topics

    ⚡ 60-Second Mental Model (Student Digest)🧠 Objective🔤 Section 1: Variables and Loops💡 Variables🔁 For Loop🔁 While Loop

    Mini Missions

    • Mission 1: Run bash -x and explain the output in one sentence.
    • Mission 2: Run mkdir -p /tmp/linux-dojo-day-23 && cd /tmp/linux-dojo-day-23 and explain the output in one sentence.
    • Mission 3: Run bash and explain the output in one sentence.
    • Mission 4: Run echo "Welcome, $name!" and explain the output in one sentence.

    Useful Resources

    📖 Digestible Study Guide & Visual Architecture

    Source: day-23-breakfast-study-guide.md · Synced with ./control-panel --day 23

    Day 23 · Breakfast — Parameterized CLI Scripts, Getopts & Production Tooling



    ZothOS × 1nc0gn30 Linux Dojo · Phase: Week 4 (Advanced Ops) · Session: Breakfast (Morning Foundation & Core Command Syntax)

    Core Commands: getopts, shift, bash -x, shellcheck, printf, jq


    ⚡ 60-Second Mental Model (Student Digest)



    ╔══════════════════════════════════════════════════════════════════════════════╗
║  ZOTHOS × 1NC0GN30 // PRODUCTION TELEMETRY, SYSTEMD & RECOVERY MATRIX        ║
╠══════════════════════════════════════════════════════════════════════════════╣
║                                                                              ║
║   ┌──────────────┐   ┌──────────────┐   ┌──────────────┐   ┌──────────────┐  ║
║   │ CPU & SCHED  │   │ MEMORY / VM  │   │ DISK & VFS   │   │ NET SOCKETS  │  ║
║   │ top / mpstat │   │ free / vmstat│   │ iostat / df  │   │ ss -tulpen   │  ║
║   └──────┬───────┘   └──────┬───────┘   └──────┬───────┘   └──────┬───────┘  ║
║          └──────────────────┴─────────┬────────┴──────────────────┘          ║
║                                       ▼                                      ║
║                  [ Automated Remediation: systemd + cron + rsync ]           ║
╚══════════════════════════════════════════════════════════════════════════════╝


    Learning PillarHow to Practice This Session
    1. Native TUI (./control-panel)Run ./control-panel from repo root → Select Week 4 → Day 23 → Breakfast to drill interactive C lessons & quizzes.
    2. Web Workstation (astro-ui)Open /day/23 → Select Breakfast tab → Type each target command in the live Mission Terminal to earn XP & streak mastery.
    3. Safe Local SandboxRun mkdir -p /tmp/linux-dojo-day-23 && cd /tmp/linux-dojo-day-23 to test every flag below without touching production files.



    🥣 Day 23 Breakfast: Shell Scripting Refresher



    🧠 Objective



    Refresh your knowledge of Bash scripting basics: variables, conditionals, loops, and basic input/output handling.



    🔤 Section 1: Variables and Loops



    💡 Variables



    name="zoth"
echo "Welcome, $name!"


    * Use "$var" to safely access values.

    🔁 For Loop



    for i in {1..5}; do
  echo "Count: $i"
done


    🔁 While Loop



    count=1
while [ $count -le 5 ]; do
  echo "Still counting: $count"
  ((count++))
done




    🔀 Section 2: Conditionals



    ✅ If-Else Example



    num=10
if [ $num -gt 5 ]; then
  echo "Greater than 5"
else
  echo "5 or less"
fi


    🧪 Nested Conditions



    if [ -f file.txt ]; then
  echo "File exists"
elif [ -d file.txt ]; then
  echo "It's a directory"
else
  echo "Does not exist"
fi




    🧾 Section 3: Input and Output



    🧍‍♂️ User Input



    read -p "Enter your username: " username
echo "Hello, $username"


    📁 Redirect Output



    echo "Log Entry" >> log.txt


    🧹 Clear File Content



    > log.txt




    ✅ Summary



    By the end of this refresher, you should be comfortable with:

    * Declaring and using variables
    * Looping with for and while
    * Handling input/output
    * Writing basic conditional logic

    Use the day-23-breakfast simulation to practice live.