Set 8

Ubuntu L2-Corporal Industry Assignments

(Set 8 | Index 71–80) Root Working Directory: ~/kactii27

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71. Process Command-Line Argument Inspection

Scenario: Ops needs to verify how a service was started.

Instructions:

• Navigate to ~/kactii27

• Create a folder named process_args

• Start a test process with arguments

• Inspect full command-line invocation

• Capture output to process_args.txt

Commands Expected: ps -ef, ps -o pid,cmd, /proc/<pid>/cmdline, redirection

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72. File System Type Behavior Comparison

Scenario: Different file systems behave differently under load.

Instructions:

• Navigate to ~/kactii27

• Create a folder named fs_behavior

• Identify filesystem type of the working directory

• Compare behavior notes with another mounted FS (read-only)

• Save findings to fs_behavior.txt

Commands Expected: df -T, mount, lsblk -f, redirection

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73. Process Environment Variable Inspection

Scenario: Environment variables differ between services.

Instructions:

• Navigate to ~/kactii27

• Create a folder named process_env

• Start a process with custom environment variables

• Inspect environment variables of the running process

• Save output to process_env.txt

Commands Expected: export, /proc/<pid>/environ, tr, redirection

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74. Disk Write Pattern Observation

Scenario: Write-heavy workloads may degrade performance.

Instructions:

• Navigate to ~/kactii27

• Create a folder named write_patterns

• Perform controlled write operations

• Observe disk usage changes

• Capture observations in write_patterns.txt

Commands Expected: dd, df -h, du -sh, redirection

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75. Signal Delivery Order & Effects

Scenario: Different signals affect processes differently.

Instructions:

• Navigate to ~/kactii27

• Create a folder named signal_effects

• Start a long-running process

• Send different signals sequentially

• Observe and document effects

• Save results to signal_effects.txt

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

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76. File Timestamp Integrity Check

Scenario: Audit requires verifying timestamp consistency.

Instructions:

• Navigate to ~/kactii27

• Create a folder named timestamp_integrity

• Create and modify files

• Inspect access, modify, and change times

• Save output to timestamps.txt

Commands Expected: stat, ls -l --time=atime, redirection

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77. System Binary Dependency Inspection

Scenario: A binary fails due to missing dependencies.

Instructions:

• Navigate to ~/kactii27

• Create a folder named binary_deps

• Inspect shared library dependencies of a binary

• Identify missing or resolved libraries

• Save output to deps.txt

Commands Expected: ldd, which, redirection

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78. Temporary Directory Safety Review

Scenario: Improper temp usage causes data leaks.

Instructions:

• Navigate to ~/kactii27

• Create a folder named tmp_safety

• Inspect system temp directories

• Review permissions and sticky bit

• Document findings in tmp_safety.txt

Commands Expected: ls -ld /tmp, stat, redirection

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79. User Session Enumeration & Validation

Scenario: Security needs visibility into active user sessions.

Instructions:

• Navigate to ~/kactii27

• Create a folder named user_sessions

• List active user sessions

• Capture login source information

• Save output to sessions.txt

Commands Expected: who, w, last, redirection

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80. Safe Privileged Command Dry-Run Analysis

Scenario: Before production changes, commands must be reviewed safely.

Instructions:

• Navigate to ~/kactii27

• Create a folder named privileged_dryrun

• Identify commands that would require sudo

• Attempt dry-run or read-only inspection

• Capture errors and notes in dryrun.txt

Commands Expected: mount, chown, permission error observation, redirection

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