Day 2 Tasks: Terminal Challenge

🐧 TASK 1: Basic Navigation

Level: Beginner

Objective: Understand directory navigation and listing files.

                # Example Demonstration

                $cd ~

                $mkdir Practice

                $cd Practice

                $pwd

Student Task

Go to root directory (`/`).
Return to your home directory (`~`).
Create folder named LinuxLab.
Enter LinuxLab.
Display all files including hidden files (`ls -a`).

📝 TASK 2: File Creation & Editing

Level: Beginner → Basic

Objective: Create and edit files using the terminal.

                # Example Demonstration

                $touch test.txt

                $echo "This is Linux Day 2" > test.txt

                $cat test.txt

Student Task

Create file named info.txt.
Write: "Linux commands are powerful" into it.
Append another line: "Practice makes perfect" (Hint: `>>`).
Display file content.

📂 TASK 3: File Management

Level: Basic → Intermediate

Objective: Copy, move, and rename files.

                # Example Demonstration

                $mkdir Data

                $cp test.txt Data/

                $mv Data/test.txt Data/backup.txt

                $mv Data/backup.txt ~/

Student Task

Create folder named Projects.
Inside it create file project1.txt.
Copy project1.txt to home directory.
Rename copied file to final_project.txt.
Delete the original file inside Projects.

🔐 TASK 4: Permissions

Level: Intermediate

Objective: Understand and modify file permissions.

                # Example Demonstration

                $touch script.sh

                $ls -l script.sh

                $chmod +x script.sh

                $chmod 700 script.sh

                # 700: Owner=rwx (7), Group=--- (0), Others=--- (0)

Student Task

Create file secure.txt.
Give read & write permission only to owner (6).
Remove all permissions from group and others (0 0).
Verify using `ls -l`. Expected: `-rw-------`.

📊 TASK 5: Process Monitoring

Level: Medium

Objective: Understand system processes and resource usage.

                # Example Demonstration

                $top # View processes (q to
                    exit)

                $free -h # Memory
                    usage

                $df -h # Disk
                    usage

                $clear
            

Student Task

Run `top` and identify the process with highest CPU usage.
Check how much RAM is free on your system.
Check how much space is left on your main disk (`/`).
Clear your terminal screen.

🔍 TASK 6: File Search & Content Filtering

Level: Medium

Objective: Search inside files and filter data using grep.

                # Example Demonstration

                $grep "Linux" data.txt # Find
                    lines with "Linux"

                $grep -c "Linux" data.txt #
                    Count occurrences

Student Task

Create file tech.txt with 5 lines of hardware/software words.
Search for the word "server".
Count how many times "server" appears (`grep -c`).
Display only lines that do NOT contain "server" (`grep -v`).

💾 TASK 7: Disk Usage Investigation

Level: Medium

Objective: Analyze which files/folders consume storage.

                # Example Demonstration

                $ls -lh # List files with
                    human-readable sizes

                $du -sh * # Check size of all
                    folders

Student Task

Create 3 files of different sizes using `dd` or `touch`.
Check disk usage of each file.
Identify which file uses maximum space.
Delete the largest file.

⚡ TASK 8: Process Control

Level: Medium → Advanced

Objective: Manage background processes and kill unwanted tasks.

                # Example Demonstration

                $sleep 300 & # Run in
                    background (&)

                $ps # Find PID

                $kill 1234 # Replace 1234
                    with actual PID

Student Task

Run 2 background sleep processes (`sleep 300 &`).
Identify both PIDs using `ps` or `jobs -l`.
Kill only one process.
Verify the other one is still running.

👤 TASK 9: User & Permission Engineering

Level: Advanced

Objective: User isolation and advanced permission security.

                # Example Demonstration

                $sudo adduser testuser

                $chmod 600 secure.txt # Owner
                    rw only

Student Task

Create user named labadmin (`sudo adduser labadmin`).
Create file project.txt inside home.
Set permissions: Owner full (7), Group read (4), Others none (0).
Verify using `ls -l`. Expected permissions: `740` (rwxr-----).
Delete user after completion.

📜 TASK 10: Bash Automation Script

Level: Advanced

Objective: Create a system information script.

                # Example using nano or vim

                $nano report.sh

                #!/bin/bash

                echo "System Report"

                date

                uptime

                $chmod +x report.sh

                $./report.sh

Student Task

Create a script named sys_check.sh.
It should print system date, current user (`whoami`), and free memory.
Make it executable.
Run the script and verify output.