Process Control Commands
Duration: 8 min
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Inside: a video lesson and guided study material.
Module outline
- Numerical Ability & Problem Solving: Speed Mathematics and Basic Mathematics, Arithmetic, Number System, HCF LCM, Divisibility Rules, Percentage, Ratio and Proportion (Ratios), Average, Profit and Loss, Simple Interest and Compound Interest, Mixture and Alligation, Time and Work, Pipe and Cistern, Speed Time and Distance, Age Problems, Partnership, Data Interpretation, Mental Ability, Sequence and Series (Series), Powers and Exponents (Surds and Indices), Algebra, Statistics, Logarithm, Mensuration and Geometry, Permutation and Combination, Probability, Sequences and Series, Powers, Surds and Logarithms, Subject-Verb Agreement, Sentence Completion, Geometry, Sentence Structure and Correction, Data Sufficiency, Trigonometry, Measurement and Quantity Take-Off, Signal Space and Optimum Detection, Probability, Statistics, Algebra, Time and Work, Speed, Time and Distance, Data Interpretation, Combinatorics
- Logical Reasoning: Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Data Sufficiency, Syllogisms, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Seating Arrangements, Blood Relations, Directions (Direction Test), Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Analytical Reasoning (Counting Figures Reasoning), Puzzle Solving (Puzzles), Calendar, Clock, Cubes & Dices, Logical Sequence Of Words, Venn Diagram, Data Arrangement, Inequality, Analogy, Ranking, Order and Sequence, Selection Decision Table (Decision Making), 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, Syllogisms and Venn Diagrams, Critical Reasoning, Order, Ranking and Sequence, Reading Comprehension, Profit, Loss and Discount, Constraint Puzzles, Traverse Surveying, Ratio and Proportion, Mensuration, Permutations and Combinations, Clocks and Calendars, Assembling and Grouping of Shapes, Transformation of Shapes, Three-Dimensional Patterns and Visualization, Cubes and Dice, Vocabulary, Blood Relations
- General Knowledge & Current Affairs (India + Rajasthan): History, Geography, Polity, Indian Economy, Static General Knowledge, State Wise GK, GK- Current Affairs, Environment, Physics
- Computer Fundamentals & Operating Systems: Basics of COA, Floating Point Rep, Digital Systems & Boolean Basics, Number Representation, Number System, Introduction to OS, File Management, Windows OS, Unix OS, Linux OS, Register Transfer and Microoperations, Virtual Memory
- Computer Networks: Introduction to CN, Data Communication, DLL: Error Control, DLL: Access Control, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Application Layer, Hardware Basics, Network Security
- Cyber Security: Cyber Threats and Malware Attacks, Role of Internet and Web Services, Security in Mobile and Wireless Computing, Electronic Data Interchange and E-Commerce, Physical Security and Cryptography Basics, Intrusion Detection Systems (IDS), Cyber Safety and Security, Ethical Hacking
- Programming (C & OOP): C Fundamentals, Control Flow, Arrays & Pointers, Functions, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling, OOPS with C++, Operators & Expressions, Sorting Algorithms, Java Fundamentals, Java
- MS Office & Data Processing: MS Office Applications, Basics of DBMS
- Internet & Web Technology: Society, Law & Ethics, Terms & Abbreviations, Keyboard Shortcuts, Emerging Tech Trends, Artificial Intelligence, Emerging Technologies, Internet Fundamentals, Website, Browser & Services, Web Design & Development, Protocols & Services, Web Publishing & Hosting, Server Side & Security
AI summary & chapters
AI Summary
An AI-generated summary of this video lecture.
This lecture introduces Linux process control commands using a structured slide titled “Process Control Commands.” The instructor presents a table comparing command names, functions, and terminal examples. Early coverage includes fg and kill, then transitions to accton, bg, and chrt. The instructor explains that accton enables process accounting by starting collection of accounting information about processes, with the example sudo accton on. The bg command is described as resuming a stopped job process in the background, demonstrated with user@linux:~$ bg %1. The chrt command is explained as manipulating real-time scheduling attributes of a process, with examples involving SCHED_OTHER and SCHED_FIFO outputs. Red annotations are used to highlight key arguments such as on, 100 in sleep 100, and scheduling policy names. Later, the lecture returns to job control with fg %1 bringing a background job to the foreground and kill terminating processes or sending signals. Signal examples include kill 12345, kill -9 12345 for force kill (SIGKILL), and kill -15 12345 for graceful termination (SIGTERM). The instructor also emphasizes privilege considerations, noting that sudo may be required depending on the process and operation. Because only sampled screenshots are available, exact spoken explanations beyond visible text and annotations cannot be fully verified.
Chapters
0:00 – 2:00 00:00-02:00
The slide titled “Process Control Commands” opens with a table focusing on fg and kill, then transitions to accton, bg, and chrt. Visible text includes “Process Control Commands,” “fg,” “kill,” “accton,” “bg,” and “chrt.” The instructor gestures while explaining, using a structured table to compare commands with terminal examples and output.
2:00 – 5:00 02:00-05:00
The lecture details accton, bg, and chrt. On-screen descriptions state that accton “Enables process accounting,” bg “Resumes a stopped (job) process in the background,” and chrt “Manipulates real-time scheduling attributes of a process.” Examples shown include sudo accton on, fg %1, bg %1, and chrt output containing SCHED_OTHER. Red underlines and circles emphasize key terms such as on, 100 in sleep 100, and scheduling policy names.
5:00 – 7:57 05:00-07:57
The focus shifts to job control and termination. The slide shows user@linux:~$ bg %1 and user@linux:~$ fg %1, with fg described as bringing a background job to the foreground. The kill command is explained as terminating a process or sending a signal, with examples: kill 12345, kill -9 12345 # Force kill (SIGKILL), and kill -15 12345 # Graceful termination (SIGTERM). The instructor circles signal numbers 9 and 15 and a note about using sudo when required.
The central teaching goal is to help students recognize and use common Linux process control commands. The lecture organizes the material into a command-function-example table, making it easy to compare what each command does and how it is typed. Key concepts include job control with fg and bg, process accounting with accton, real-time scheduling manipulation with chrt, and process termination or signaling with kill. The instructor uses terminal examples to connect definitions to practical usage: bg %1 resumes a stopped job in the background, fg %1 brings it back to the foreground, sudo accton on enables accounting, and chrt examples show scheduling policies such as SCHED_OTHER. The kill section distinguishes default termination from explicit signals, emphasizing that -9 sends SIGKILL for forceful termination while -15 sends SIGTERM for graceful shutdown. Privilege management is also highlighted, with sudo noted as potentially required depending on the target process and operation. Red annotations serve as visual cues for important arguments, signal numbers, and policy names, supporting exam revision by drawing attention to syntax details that are likely to be tested.