System Commands Week 8 Graded Assignment Solutions

💻 System Commands Week 8 Graded Assignment Solutions

Versions: v1_t12024 / v2_t12025 / v3_t12026 —
Complete solutions covering System Configuration, Archiving (tar/gzip), Cron Job Scheduling, and Advanced Text Processing with sed Regular Expressions.

This downloadable PDF bundle provides complete, detailed solutions for the two primary graded assignments in System Commands Week 8.
The assignments test mastery of system configuration, routine task automation, and sophisticated file editing.

Part 1: System Monitoring, Archiving, and Scheduling

Covers questions related to machine introspection, file packaging, and timed automation:

• Hardware Information: Identify commands (e.g., hwinfo, cat /proc/cpuinfo) used to check processor information on a Linux machine.
• Cron Scheduling: Determine the execution frequency (e.g., once per day) and specific days (e.g., Monday–Friday) for a given cron job entry, based on its time fields.
• Prompt Customization: Identify the correct PS1 variable setting to configure the shell prompt string with components like date, command number, and hostname.
• Archiving (tar): Select the correct tar command options to create an archive, extract files, and understand archive properties.
• Compression (gzip): Compare the compression effectiveness of gzip on files containing repetitive patterns versus random data.
• File System Cleanup: Identify the correct find commands (-empty, -delete) to list and delete all empty files.

Part 2: Advanced Stream Editor (sed) Operations

Covers the theory and execution of the stream editor for text manipulation (approx. 11 questions):

• sed Actions and Flags: Match the function of various sed action characters (e.g., p, d, a) and special flags (e.g., n, g).
• Line Selection and Deletion: Identify sed commands that delete lines based on address ranges (1,3d) or content patterns (/pattern/d).
• Nested Piped Commands: Identify the sed command equivalent to a complex piped operation involving cat, head, and tail.
• Substitution (s Command): Identify commands that perform case-insensitive deletion (s/pattern//ig), replace the last occurrence on a specific line ($), and use capture groups (\(...\), \1) to manipulate case in the output.
• Insertion and Appending: Analyze commands that use the a action to insert new content before or after lines matching a pattern.
• Regex Output Prediction: Predict the exact output of sed when complex regular expressions and back-referencing are applied to a string.