Set 2

Ubuntu L2-Corporal Industry Assignments

(Set 2 | Index 11–20) Root Working Directory: ~/kactii27

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11. Process Priority & Niceness Control

Scenario: A production process is starving other workloads.

Instructions:

• Navigate to ~/kactii27

• Create a folder named process_priority

• Start a long-running test process

• Inspect its priority

• Change its nice value

• Capture before/after state in priority_report.txt

Commands Expected: ps, top, nice, renice, redirection

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12. Signal Handling & Graceful Termination

Scenario: An application must be stopped without data loss.

Instructions:

• Navigate to ~/kactii27

• Create a folder named signal_handling

• Start a test process

• Send different signals (TERM vs KILL)

• Observe behavior differences

• Document results in signals.txt

Commands Expected: kill, kill -l, ps, redirection

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13. Advanced File Search with Conditions

Scenario: Ops must locate files meeting strict criteria.

Instructions:

• Navigate to ~/kactii27

• Create a folder named advanced_find

• Create files with different sizes, names, and permissions

• Search using multiple conditions (name + size + type)

• Save output to find_results.txt

Commands Expected: find, logical operators, redirection

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14. File Permission Mask (umask) Enforcement

Scenario: Default permissions must comply with policy.

Instructions:

• Navigate to ~/kactii27

• Create a folder named umask_policy

• Display current umask

• Temporarily change umask

• Create files and directories

• Verify resulting permissions

• Save output to umask_policy.txt

Commands Expected: umask, touch, mkdir, ls -l, redirection

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15. Network Port & Socket Inspection

Scenario: Security team requests a live port inventory.

Instructions:

• Navigate to ~/kactii27

• Create a folder named port_inspection

• List listening TCP/UDP ports

• Identify owning processes

• Save snapshot to ports.txt

Commands Expected: ss, netstat, lsof, redirection

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16. Mount Failure Simulation & Recovery

Scenario: A mount point fails during deployment.

Instructions:

• Navigate to ~/kactii27

• Create a folder named mount_recovery

• Attempt an invalid mount (safe, non-destructive)

• Capture error output

• Demonstrate correct mount syntax

• Save logs to mount_errors.txt

Commands Expected: mount, umount, error redirection

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17. Large File Stream Processing

Scenario: Logs are too large to open normally.

Instructions:

• Navigate to ~/kactii27

• Create a folder named stream_processing

• Generate a large text file

• View partial content safely

• Extract specific sections

• Save output to stream_output.txt

Commands Expected: head, tail, less, redirection

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18. File Descriptor & Resource Limit Audit

Scenario: System instability suspected due to resource exhaustion.

Instructions:

• Navigate to ~/kactii27

• Create a folder named resource_limits

• Inspect open file limits

• Check current usage

• Save snapshot to limits.txt

Commands Expected: ulimit, lsof, /proc, redirection

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19. Background Job Control & Recovery

Scenario: A background task must be paused and resumed.

Instructions:

• Navigate to ~/kactii27

• Create a folder named job_control

• Run a process in background

• Suspend and resume it

• Bring it to foreground

• Capture job states in jobs.txt

Commands Expected: &, jobs, bg, fg, Ctrl+Z

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20. Controlled Archive Corruption Test

Scenario: Backup integrity must be validated.

Instructions:

• Navigate to ~/kactii27

• Create a folder named archive_corruption

• Create and compress files

• Intentionally corrupt the archive

• Attempt extraction

• Capture errors and behavior in corruption_report.txt

Commands Expected: tar, gzip, gunzip, error output redirection

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