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BCA-204N · Unix and Shell Programming
Unit 1

Unix Architecture, Commands & Process Management

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Unit 1 Learning Hub

Unix Architecture, Commands & Process Management

Official MJPRU BCA Unit 1: Unix Architecture, Commands & Process Management for BCA-204N (Unix and Shell Programming).

Syllabus Topics:History and Evolution of UNIX: Ken Thompson, Dennis Ritchie, Bell Labs, BSD, POSIX, Linux FoundationSalient Features of UNIX: Multi-user, Multitasking, Portability, Hierarchical File System, Tool-Building PhilosophyUNIX System Architecture: Hardware Layer, Kernel Layer, System Call Interface, Shell Layer, Application UtilitiesUNIX Command Syntax & Format: Command Name, Options (Flags -a, --long), Command Arguments, Standard OutputInternal (Built-in) vs External (Disk-Based) Commands: type Command, which Command, Command Path Hash TableGeneral Utilities & Help Facilities: man Pages (Sections 1-8), whatis, apropos, date, cal, echo, clear, bannerDirectory Management Commands: pwd, mkdir (-p flag), rmdir, cd (Path Traversal . and ..)File Manipulation Commands: ls (Options -l, -a, -R, -t, -h), touch, cp (-r, -i), mv, rm (-r, -f), cat, more, less, head, tail (-f)Disk & System Status Commands: df (-h), du (-sh), free, uname (-a), who, w, whoami, id, uptimeUNIX Process Management: Process Concept, PID, PPID, Process States (Running, Sleeping, Stopped, Zombie), ps Command (aux, -ef)Process Scheduling & Background Execution: Ampersand (&), nohup, jobs, fg, bg, nice, renice Priorities (-20 to 19)Process Termination & Signals: kill Command, killall, Standard Signals (SIGTERM 15, SIGKILL 9, SIGINT 2, SIGHUP 1), top Command
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Introduction to Computers & The IPO Cycle

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Topic 1 · The foundation of modern computing

Introduction to Computers & The IPO Cycle

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Ready to master this concept? Give it a quick read & tap the check!

💡 The Big Picture:A computer is an electronic system that takes raw data as Input, processes it under programmed logic, and produces meaningful Information as Output.
🍪 Everyday Analogy:Think of baking cookies: Flour & Sugar (Input) ➔ The Oven (Processing) ➔ Warm Delicious Cookie (Output)! 🍪
Key Exam Takeaways
  • ·Data = Raw, unprocessed facts without context (e.g. 42, 'apple').
  • ·Information = Structured data with meaning (e.g. 'Temperature: 42°C').
  • ·Hardware is what you can touch; Software is the instructions running inside.
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Which of the following represents unprocessed raw facts?

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