Set 6

Ubuntu L2-Corporal Industry Assignments

(Set 6 | Index 51–60) Root Working Directory: ~/kactii27

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51. Process Restart & Stability Verification

Scenario: A background process must be restarted without leaving zombies.

Instructions:

• Navigate to ~/kactii27

• Create a folder named process_restart

• Start a long-running test process

• Stop and restart it cleanly

• Verify no zombie processes remain

• Save findings to restart_report.txt

Commands Expected: ps, kill, pstree, grep, redirection

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52. Controlled Network Failure Simulation (Local)

Scenario: Ops wants to observe behavior during network disruption.

Instructions:

• Navigate to ~/kactii27

• Create a folder named network_failure

• Capture baseline network state

• Temporarily disable an interface (if permitted) (otherwise simulate via observation only)

• Re-enable and verify recovery

• Save results to network_recovery.txt

Commands Expected: ip link, ip a, ping, redirection

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53. File Access Pattern Audit

Scenario: Unexpected file access is suspected.

Instructions:

• Navigate to ~/kactii27

• Create a folder named access_audit

• Access files multiple times

• Inspect access timestamps

• Compare modification vs access times

• Save output to access_audit.txt

Commands Expected: stat, ls -lu, redirection

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54. Directory Permission Boundary Enforcement

Scenario: A directory must block traversal by unauthorized users.

Instructions:

• Navigate to ~/kactii27

• Create a folder named traversal_control

• Adjust execute permissions on directories

• Test traversal behavior

• Restore safe permissions

• Save observations to traversal_report.txt

Commands Expected: chmod, ls -ld, permission behavior observation

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55. Log Rotation Awareness Drill (Manual)

Scenario: Logs grow endlessly due to missing rotation.

Instructions:

• Navigate to ~/kactii27

• Create a folder named log_rotation

• Create and grow a log file

• Archive older logs manually

• Compress archived logs

• Save actions to log_rotation.txt

Commands Expected: mv, tar, gzip, ls, redirection

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56. CPU Affinity Observation (Read-Only)

Scenario: Performance tuning requires understanding CPU usage distribution.

Instructions:

• Navigate to ~/kactii27

• Create a folder named cpu_affinity

• Inspect CPU and core layout

• Observe process CPU allocation

• Save findings to cpu_affinity.txt

Commands Expected: lscpu, ps -o pid,psr,cmd, redirection

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57. Network Name Resolution Path Analysis

Scenario: DNS resolution is inconsistent across environments.

Instructions:

• Navigate to ~/kactii27

• Create a folder named dns_path

• Resolve hostnames using multiple tools

• Compare resolution results

• Save output to dns_path.txt

Commands Expected: getent hosts, nslookup, dig (if available), redirection

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58. File Metadata Integrity Verification

Scenario: File metadata corruption is suspected.

Instructions:

• Navigate to ~/kactii27

• Create a folder named metadata_check

• Capture metadata before file operations

• Modify files

• Re-capture metadata

• Compare results and document

Commands Expected: stat, ls -l, redirection

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59. Kernel Parameter Inspection (Read-Only)

Scenario: Ops needs visibility into kernel tuning parameters.

Instructions:

• Navigate to ~/kactii27

• Create a folder named kernel_params

• Inspect selected kernel parameters

• Document current values

• Save output to kernel_params.txt

Commands Expected: sysctl -a (read-only), grep, redirection

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60. Controlled System Stress Awareness Drill

Scenario: Team must understand system stress signals.

Instructions:

• Navigate to ~/kactii27

• Create a folder named system_stress

• Generate controlled CPU or disk activity

• Monitor system response

• Stop activity safely

• Save observations to stress_report.txt

Commands Expected: yes, dd, top, kill, redirection

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