How do I learn using both the TUI and the Web GUI?

Clone https://github.com/1nc0gn30/30-days-of-Linux-Fundamentals and run ./control-panel for the native C terminal TUI (with built-in Markdown reader, Flashcard Arena, and /tmp sandbox shells), or use the Astro Web GUI for browser command drills, XP tracking, and visual chmod/FHS calculators.

Is 30 Days of Linux Fundamentals completely free?

Yes, 100% of the 30 days, 90 study guides, C TUI drills, and web tools are open-source and unlocked by default with zero paywalls.

← Back to 30-Day Curriculum

WEEK 3 · SECURITY & WORKFLOWS · TUI: ./control-panel --day 18

Day 18: Text Processing Pipelines: Grep, Sed, Awk & Regex

Chain regex searches, stream editors, and column processors to extract actionable intelligence from logs.

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)🥐 Lesson 1: Understanding Backup Types🥐 Lesson 2: Using `tar` for Backup🥐 Lesson 3: Using `rsync` for Incremental Backups📚 Additional Resources

Mini Missions

Mission 1: Run grep -E and explain the output in one sentence.
Mission 2: Run sed -i and explain the output in one sentence.
Mission 3: Run awk and explain the output in one sentence.
Mission 4: Run cut and explain the output in one sentence.

Useful Resources

📖 Digestible Study Guide & Visual Architecture

Source: day-18-breakfast-guide.md · Synced with ./control-panel --day 18

Day 18 · Breakfast — Text Processing Pipelines: Grep, Sed, Awk & Regex

ZothOS × 1nc0gn30 Linux Dojo · Phase: Week 3 (Security & Workflows) · Session: Breakfast (Morning Foundation & Core Command Syntax)

Core Commands: grep -E, sed -i, awk, cut, sort, uniq -c

⚡ 60-Second Mental Model (Student Digest)

╔══════════════════════════════════════════════════════════════════════════════╗
║  ZOTHOS × 1NC0GN30 // DEFENSE-IN-DEPTH & STREAM PIPELINE ARCHITECTURE        ║
╠══════════════════════════════════════════════════════════════════════════════╣
║                                                                              ║
║  [ INBOUND PACKET ] ──► [ Netfilter: iptables / nftables ]                   ║
║                                │ (ACCEPT)                                    ║
║                                ▼                                             ║
║                         [ Hardened SSHD + Fail2Ban ]                         ║
║                                │                                             ║
║                                ▼                                             ║
║                         [ DAC: chmod/chown ] ──► [ MAC: SELinux / AppArmor ] ║
║                                │                                             ║
║                                ▼                                             ║
║                         [ Auditd & Log Pipelines: grep | awk | sed ]         ║
╚══════════════════════════════════════════════════════════════════════════════╝

Learning Pillar	How to Practice This Session
1. Native TUI (`./control-panel`)	Run `./control-panel` from repo root → Select Week 3 → Day 18 → Breakfast to drill interactive C lessons & quizzes.
2. Web Workstation (`astro-ui`)	Open `/day/18` → Select Breakfast tab → Type each target command in the live Mission Terminal to earn XP & streak mastery.
3. Safe Local Sandbox	Run `mkdir -p /tmp/linux-dojo-day-18 && cd /tmp/linux-dojo-day-18` to test every flag below without touching production files.

🥐 Lesson 1: Understanding Backup Types

Full Backup: Captures all files every time. Takes longest but easiest to restore.

Incremental Backup: Only backs up files changed since the last incremental backup. Fastest and smallest in size.

Differential Backup: Backs up all changes since the last full backup. Larger than incremental, but faster to restore.

🥐 Lesson 2: Using `tar` for Backup

tar -czvf backup.tar.gz /home/user/

-c: Create a new archive

-z: Compress using gzip

-v: Verbose output

-f: Specify filename

Use tar to compress and archive files for full backups or one-time archives.

🥐 Lesson 3: Using `rsync` for Incremental Backups

rsync -av --delete /home/user/ /mnt/backup/

-a: Archive mode (preserves permissions, symbolic links, etc.)

-v: Verbose output

--delete: Ensures that deletions in source are reflected in destination

rsync is ideal for incremental backups due to its efficiency and ability to sync only changed files.

📚 Additional Resources

https://linuxize.com/post/how-to-create-and-extract-archives-using-the-tar-command-in-linux/

https://rsync.samba.org/

🥪 Lunch (Workflows) 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)🍱 Lesson 1: Automating with Cron🍱 Lesson 2: Snapshots with Btrfs🍱 Lesson 3: Remote Backups via SSH + rsync📚 Resources

Mini Missions

Mission 1: Run grep -E and explain the output in one sentence.
Mission 2: Run sed -i and explain the output in one sentence.
Mission 3: Run awk and explain the output in one sentence.
Mission 4: Run cut and explain the output in one sentence.

Useful Resources

📖 Digestible Study Guide & Visual Architecture

Source: day-18-lunch-guide.md · Synced with ./control-panel --day 18

Day 18 · Lunch — Text Processing Pipelines: Grep, Sed, Awk & Regex

ZothOS × 1nc0gn30 Linux Dojo · Phase: Week 3 (Security & Workflows) · Session: Lunch (Midday Operational Workflows & Flag Mastery)

Core Commands: grep -E, sed -i, awk, cut, sort, uniq -c

⚡ 60-Second Mental Model (Student Digest)

╔══════════════════════════════════════════════════════════════════════════════╗
║  ZOTHOS × 1NC0GN30 // DEFENSE-IN-DEPTH & STREAM PIPELINE ARCHITECTURE        ║
╠══════════════════════════════════════════════════════════════════════════════╣
║                                                                              ║
║  [ INBOUND PACKET ] ──► [ Netfilter: iptables / nftables ]                   ║
║                                │ (ACCEPT)                                    ║
║                                ▼                                             ║
║                         [ Hardened SSHD + Fail2Ban ]                         ║
║                                │                                             ║
║                                ▼                                             ║
║                         [ DAC: chmod/chown ] ──► [ MAC: SELinux / AppArmor ] ║
║                                │                                             ║
║                                ▼                                             ║
║                         [ Auditd & Log Pipelines: grep | awk | sed ]         ║
╚══════════════════════════════════════════════════════════════════════════════╝

Learning Pillar	How to Practice This Session
1. Native TUI (`./control-panel`)	Run `./control-panel` from repo root → Select Week 3 → Day 18 → Lunch to drill interactive C lessons & quizzes.
2. Web Workstation (`astro-ui`)	Open `/day/18` → Select Lunch tab → Type each target command in the live Mission Terminal to earn XP & streak mastery.
3. Safe Local Sandbox	Run `mkdir -p /tmp/linux-dojo-day-18 && cd /tmp/linux-dojo-day-18` to test every flag below without touching production files.

🍱 Lesson 1: Automating with Cron

crontab -e
# Example:
0 2 * * * tar -czf /backup/home_backup.tar.gz /home/user

🍱 Lesson 2: Snapshots with Btrfs

sudo btrfs subvolume snapshot /data /snapshots/data_$(date +%F)

🍱 Lesson 3: Remote Backups via SSH + rsync

rsync -avz /home/user/ user@remote:/backup/user/

📚 Resources

https://crontab.guru/

https://wiki.archlinux.org/title/Rsync

https://btrfs.readthedocs.io/en/latest/btrfs-snapshot.html

🍽️ Dinner (Hardening) 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)🍽️ Lab 1: Create Local Backups🍽️ Lab 2: Automate with Cron🍽️ Lab 3: Test Restoration✅ Summary

Mini Missions

Mission 1: Run grep -E and explain the output in one sentence.
Mission 2: Run sed -i and explain the output in one sentence.
Mission 3: Run awk and explain the output in one sentence.
Mission 4: Run cut and explain the output in one sentence.

Useful Resources

📖 Digestible Study Guide & Visual Architecture

Source: day-18-dinner-guide.md · Synced with ./control-panel --day 18

Day 18 · Dinner — Text Processing Pipelines: Grep, Sed, Awk & Regex

ZothOS × 1nc0gn30 Linux Dojo · Phase: Week 3 (Security & Workflows) · Session: Dinner (Evening Hardening, Pipelines & Verification Lab)

Core Commands: grep -E, sed -i, awk, cut, sort, uniq -c

⚡ 60-Second Mental Model (Student Digest)

╔══════════════════════════════════════════════════════════════════════════════╗
║  ZOTHOS × 1NC0GN30 // DEFENSE-IN-DEPTH & STREAM PIPELINE ARCHITECTURE        ║
╠══════════════════════════════════════════════════════════════════════════════╣
║                                                                              ║
║  [ INBOUND PACKET ] ──► [ Netfilter: iptables / nftables ]                   ║
║                                │ (ACCEPT)                                    ║
║                                ▼                                             ║
║                         [ Hardened SSHD + Fail2Ban ]                         ║
║                                │                                             ║
║                                ▼                                             ║
║                         [ DAC: chmod/chown ] ──► [ MAC: SELinux / AppArmor ] ║
║                                │                                             ║
║                                ▼                                             ║
║                         [ Auditd & Log Pipelines: grep | awk | sed ]         ║
╚══════════════════════════════════════════════════════════════════════════════╝

Learning Pillar	How to Practice This Session
1. Native TUI (`./control-panel`)	Run `./control-panel` from repo root → Select Week 3 → Day 18 → Dinner to drill interactive C lessons & quizzes.
2. Web Workstation (`astro-ui`)	Open `/day/18` → Select Dinner tab → Type each target command in the live Mission Terminal to earn XP & streak mastery.
3. Safe Local Sandbox	Run `mkdir -p /tmp/linux-dojo-day-18 && cd /tmp/linux-dojo-day-18` to test every flag below without touching production files.

🍽️ Lab 1: Create Local Backups

tar -czvf etc_backup.tar.gz /etc
rsync -av /home/user/ /mnt/backup/

🍽️ Lab 2: Automate with Cron

nano ~/scripts/daily_backup.sh
crontab -e
# Add:
0 1 * * * /home/user/scripts/daily_backup.sh
chmod +x ~/scripts/daily_backup.sh

🍽️ Lab 3: Test Restoration

mkdir /tmp/etc_restore
tar -xzvf etc_backup.tar.gz -C /tmp/etc_restore
diff -r /etc /tmp/etc_restore

✅ Summary

Created, automated, and restored backups locally and remotely.

YouTube Study Radio

🍳 Breakfast (Syntax) Session

Live Terminal Drill

Command Board

Command Intel

Meaning

Sample Output

Useful Fun Fact

Last Run Output

Knowledge Boost

Key Topics

Mini Missions

Useful Resources

📖 Digestible Study Guide & Visual Architecture

Day 18 · Breakfast — Text Processing Pipelines: Grep, Sed, Awk & Regex

⚡ 60-Second Mental Model (Student Digest)

🥐 Lesson 1: Understanding Backup Types

🥐 Lesson 2: Using tar for Backup

🥐 Lesson 3: Using rsync for Incremental Backups

📚 Additional Resources

🥪 Lunch (Workflows) Session

Live Terminal Drill

Command Board

Command Intel

Meaning

Sample Output

Useful Fun Fact

Last Run Output

Knowledge Boost

Key Topics

Mini Missions

Useful Resources

📖 Digestible Study Guide & Visual Architecture

Day 18 · Lunch — Text Processing Pipelines: Grep, Sed, Awk & Regex

⚡ 60-Second Mental Model (Student Digest)

🍱 Lesson 1: Automating with Cron

🍱 Lesson 2: Snapshots with Btrfs

🍱 Lesson 3: Remote Backups via SSH + rsync

📚 Resources

🍽️ Dinner (Hardening) Session

Live Terminal Drill

Command Board

Command Intel

Meaning

Sample Output

Useful Fun Fact

Last Run Output

Knowledge Boost

Key Topics

Mini Missions

Useful Resources

📖 Digestible Study Guide & Visual Architecture

Day 18 · Dinner — Text Processing Pipelines: Grep, Sed, Awk & Regex

⚡ 60-Second Mental Model (Student Digest)

🍽️ Lab 1: Create Local Backups

🍽️ Lab 2: Automate with Cron

🍽️ Lab 3: Test Restoration

✅ Summary

🥐 Lesson 2: Using `tar` for Backup

🥐 Lesson 3: Using `rsync` for Incremental Backups