Disk & Storage Commands

Duration: 7 min

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Module outline

  1. English Comprehension: Comprehension / Reading Comprehension / Unseen Passages (Critical Reasoning) (Paragraph Questions), Reading Comprehension, Vocabulary, Idioms and Phrases, Narrative Sequencing, Critical Reasoning
  2. Reasoning and Aptitude: Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Analogy, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Blood Relations, Directions (Direction Test), Ranking, Order and Sequence, Logical Sequence Of Words, Seating Arrangements, Puzzle Solving (Puzzles), Syllogisms, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Data Sufficiency, Selection Decision Table (Decision Making), Calendar, Clock, Cubes & Dices, Data Arrangement, Venn Diagram, Analytical Reasoning (Counting Figures Reasoning), Number System, HCF LCM, Percentage, Ratio and Proportion (Ratios), Average, Profit and Loss, Simple Interest and Compound Interest, Speed Time and Distance, Mensuration and Geometry, Arithmetic, Mixture and Alligation, Age Problems, Data Interpretation, Alphabet and Word Tests, Numerical Reasoning, Number System, Averages, Mixtures and Alligation, Percentages, Series Completion, Analogy and Classification, Patterns in Two-Dimensional Figures, Coding and Decoding, Mathematical Operations, Direction Sense, Logical Deduction and Induction, Simplification and Approximation, Assembling and Grouping of Shapes, Transformation of Shapes, Three-Dimensional Patterns and Visualization, Cubes and Dice, Algebra, Traverse Surveying, Clocks and Calendars, Order, Ranking and Sequence, Constraint Puzzles, Syllogisms and Venn Diagrams, Ratio and Proportion, Mensuration, Permutations and Combinations, Project Monitoring, Resources and Safety, Profit, Loss and Discount, Sequences and Series, Powers, Surds and Logarithms, Subject-Verb Agreement, Sentence Completion, Geometry, Probability, Trigonometry, Measurement and Quantity Take-Off, Statistics, Data Sufficiency, Blood Relations, Speed, Time and Distance, Time and Work, Data Interpretation, Sequence and Series (Series), Algebra, Permutation and Combination, Combinatorics
  3. General Awareness: Physics, Chemistry, Biology, Geography, History, Polity, Indian Economy
  4. Computer Fundamentals: Basics of COA, Number System, Number Representation, Semiconductor Memories and Programmable Logic, Timing, Hazards and Testing, Processor Organization and Instructions, Number Systems and Codes, Combinational Logic Design, Combinational Logic Circuits, Number Systems and Codes
  5. Operating System: Introduction to OS, Unix OS, Linux OS
  6. C Programming: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling
  7. OOPS with C++ & Java: OOPS with C++, Java
  8. Database Management System: Basics of DBMS, SQL
  9. MS Office: MS Office Applications
  10. Internet & Web Technologies: Website, Browser & Services, Internet Fundamentals, Web Design & Development, Protocols & Services
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This lecture introduces Linux disk and storage commands, progressing from space inspection to filesystem management. The instructor begins by comparing `df -h` and `du -sh`, explaining that both use the `-h` flag for human-readable output. `df -h` reports filesystem-level disk space usage, showing columns such as Size, Used, Avail, Use%, and Mounted on. `du -sh` reports the total size of a directory tree; the `-s` flag means summary, and an example shows `1.2G /home/user/Documents`. The lesson then moves to mounting: `sudo mount /dev/sdb1 /mnt/data` attaches a partition or USB device to a directory, and the result is verified with `df -h | grep /mnt/data`, which displays `/dev/sdb1 100G 46G 55G 43% /mnt/data`. Finally, the slide covers `umount` for detaching filesystems and `fdisk -l` for listing disk partitions, with a warning that root privileges are required. The teaching flow is: inspect space, mount storage, verify the mount, unmount, and examine partitions.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The opening slide, titled 'Disk & Storage Commands', presents a three-column table comparing `df -h` and `du -sh`. The instructor explains that `df -h` displays disk space usage in a human-readable format, while `du -sh` shows the total size of a directory. Terminal output for `df -h` lists filesystem sizes, used space, and mount points; `du -sh` output shows directory sizes such as Desktop, Documents, and Downloads. Red annotations begin to appear over the `df -h` command.

  2. 2:00 – 5:00 02:00-05:00

    The instructor annotates the slide in detail. The `-h` flag is labeled 'human readable', and the `df -h` columns are described as disk file system size. Red boxes outline the Size, Used, Avail, Use%, and Mounted on columns in the terminal output. For `du -sh`, the `-s` flag is labeled 'summary', and the example shows `1.2G /home/user/Documents`. The lesson then transitions to mounting: a red underline highlights `sudo mount /dev/sdb1 /mnt/data`, and a red box surrounds the verification output from `df -h | grep /mnt/data`, which reads `/dev/sdb1 100G 46G 55G 43% /mnt/data`.

  3. 5:00 – 6:47 05:00-06:47

    The final slide expands the table to include `mount`, `umount`, and `fdisk`. The instructor explains that `mount` attaches a filesystem (USB, partition, network share) to a directory using the syntax shown earlier. `umount` is presented for detaching filesystems, and `fdisk -l` is shown with the command `sudo fdisk -l` for listing disk partitions. A warning note emphasizes that root privileges are needed for these operations, and the instructor gestures while summarizing the workflow.

The lecture builds a practical sequence for managing Linux storage. First, `df -h` and `du -sh` are distinguished: `df` reports filesystem capacity, while `du` reports directory content size. Both rely on `-h` for human-readable units. Second, the `mount` command is taught with a concrete example: mounting `/dev/sdb1` to `/mnt/data` and verifying it by filtering `df -h` output with `grep`. Third, `umount` and `fdisk -l` complete the toolkit for detaching storage and inspecting partitions. The central takeaway is that root privileges are required for mount, unmount, and fdisk operations.

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