Set 9

Ubuntu L2-Corporal Industry Assignments

(Set 9 | Index 81–90) Root Working Directory: ~/kactii27

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81. Process Start-Time & Runtime Analysis

Scenario: Ops needs to verify how long critical processes have been running.

Instructions:

• Navigate to ~/kactii27

• Create a folder named process_runtime

• Start one or more test processes

• Inspect start time and elapsed runtime

• Save observations to runtime.txt

Commands Expected: ps -eo pid,lstart,etime,cmd, date, redirection

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82. Memory Mapping Inspection (Read-Only)

Scenario: Engineers want visibility into how memory is mapped for a process.

Instructions:

• Navigate to ~/kactii27

• Create a folder named memory_maps

• Start a simple process

• Inspect its memory map

• Save sample output to maps.txt

Commands Expected: pmap, /proc/<pid>/maps, redirection

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83. File Handle Leakage Detection

Scenario: A process is suspected of leaking file descriptors.

Instructions:

• Navigate to ~/kactii27

• Create a folder named fd_leak

• Start a long-running process

• Observe open file count over time

• Document findings in fd_leak.txt

Commands Expected: lsof, ls /proc/<pid>/fd, wc -l, redirection

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84. CPU Scheduling Policy Awareness

Scenario: Performance varies due to scheduling differences.

Instructions:

• Navigate to ~/kactii27

• Create a folder named cpu_scheduling

• Inspect scheduling policy of a process

• Compare policies (read-only)

• Save output to scheduling.txt

Commands Expected: chrt -p, ps -o pid,cls,pri,cmd, redirection

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85. Disk Read-Ahead & Cache Observation

Scenario: Disk performance tuning is under investigation.

Instructions:

• Navigate to ~/kactii27

• Create a folder named disk_cache

• Inspect block device read-ahead settings

• Observe disk read behavior

• Save findings to cache.txt

Commands Expected: lsblk -o NAME,RA, blockdev --getra (read-only), redirection

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86. Network Packet Loss Pattern Study

Scenario: Intermittent packet loss impacts services.

Instructions:

• Navigate to ~/kactii27

• Create a folder named packet_loss

• Ping hosts over longer durations

• Capture packet loss statistics

• Save output to packet_loss.txt

Commands Expected: ping -c, redirection

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87. File Ownership Transfer Simulation

Scenario: Project ownership changes hands.

Instructions:

• Navigate to ~/kactii27

• Create a folder named ownership_transfer

• Create files and directories

• Change ownership (simulate with current user)

• Verify recursive changes

• Save output to ownership_transfer.txt

Commands Expected: chown, ls -lR, stat, redirection

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88. Service Dependency Awareness (Read-Only)

Scenario: Understanding service startup dependencies.

Instructions:

• Navigate to ~/kactii27

• Create a folder named service_deps

• Inspect dependencies of a system service

• Identify required and optional units

• Save output to service_deps.txt

Commands Expected: systemctl list-dependencies, redirection

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89. Binary Capability Inspection

Scenario: Security audit checks elevated binary capabilities.

Instructions:

• Navigate to ~/kactii27

• Create a folder named binary_caps

• Inspect file capabilities on system binaries

• Document any findings

• Save output to caps.txt

Commands Expected: getcap, setcap -r (inspection only), redirection

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90. Controlled Crash Observation & Logging

Scenario: Engineers must understand how crashes are reported.

Instructions:

• Navigate to ~/kactii27

• Create a folder named crash_observation

• Trigger a controlled failure

• Observe error messages and exit codes

• Save output to crash_log.txt

Commands Expected: false, invalid command execution, $?, error redirection

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L2-Corporal Enforcement Rules (Still Absolute)

• Every assignment must begin with:

  cd ~/kactii27

• No scripting

• No Python

• No GUI tools

• CLI only

• All outputs saved under ~/kactii27

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