Windows Command Prompt Mastery
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Questions and Answers

Which symbol is used for input redirection in a command prompt?

  • |
  • &
  • < (correct)
  • >
  • What is the purpose of input redirection in programming?

  • To generate an End-of-File character
  • To remove the tedium of typing lots of values
  • To redirect the contents of a text file as output
  • To automate programs without user interaction (correct)
  • How does input redirection using a text file differ from manually typing integral values in the shell?

  • It produces different results (correct)
  • It requires the use of a different symbol
  • It does not generate an End-of-File character
  • It eliminates the need for input redirection
  • Which command is used to change directories in the Windows shell?

    <p>cd</p> Signup and view all the answers

    What does the period character represent in a relative pathname?

    <p>Current working directory</p> Signup and view all the answers

    Which command is used to create a new directory in the current working directory?

    <p>mkdir</p> Signup and view all the answers

    What is the purpose of wildcards in the Windows shell?

    <p>To manipulate groups of files with similar names</p> Signup and view all the answers

    Which operating system powers servers running the web and internet?

    <p>Linux</p> Signup and view all the answers

    What is the main advantage of Linux?

    <p>It is free</p> Signup and view all the answers

    Why is experience in Linux beneficial for software developers and engineers?

    <p>It is in high demand</p> Signup and view all the answers

    What is the main difference between command-line interfaces (CLIs) and graphical user interfaces (GUIs)?

    <p>CLIs are text-based</p> Signup and view all the answers

    Which of the following is an advantage of using the shell?

    <p>Ability to automate manual tasks</p> Signup and view all the answers

    What is the purpose of a makefile?

    <p>To specify tasks for the C compiler</p> Signup and view all the answers

    What is the case sensitivity of the Windows shell?

    <p>Windows shell is not case-sensitive</p> Signup and view all the answers

    What does the 'up-arrow' key do in the Windows shell?

    <p>Returns the previous command</p> Signup and view all the answers

    Which one of these is a characteristic of a hierarchical file system?

    <p>Directories are organized in a tree structure.</p> Signup and view all the answers

    What is the root directory represented by in a hierarchical file system?

    <p>A backslash</p> Signup and view all the answers

    What is the current working directory of the shell when it is in the root directory?

    <p>A backslash</p> Signup and view all the answers

    What is a path in a file system?

    <p>The list of parent directories leading to the file</p> Signup and view all the answers

    Which of the following is true about streams in operating systems?

    <p>Streams are sequences of characters that may be associated with a file or a physical device.</p> Signup and view all the answers

    What is the default device for standard output in operating systems?

    <p>Computer screen</p> Signup and view all the answers

    What is the purpose of a redirection operator in operating systems?

    <p>To redirect output from standard output to a file</p> Signup and view all the answers

    What is the purpose of the End-of-File character (EOF) in operating systems?

    <p>To signal the end of an input stream</p> Signup and view all the answers

    Which of the following is NOT a system resource that an operating system manages?

    <p>Keyboard</p> Signup and view all the answers

    Which of the following best describes safe coordination in an operating system?

    <p>Allowing only one program to access a resource at a time</p> Signup and view all the answers

    What is the purpose of system utilities or commands in an operating system?

    <p>Performing universal functions</p> Signup and view all the answers

    What is a file system?

    <p>A file system is a type of index used by the operating system to organize and locate files on a storage device.</p> Signup and view all the answers

    What is a hierarchical file system?

    <p>A hierarchical file system is a system where directories are organized in a tree-like structure, starting from the root directory.</p> Signup and view all the answers

    What is the root directory?

    <p>The root directory is the starting point of the hierarchical file system, represented by a backslash. It does not have a name.</p> Signup and view all the answers

    What is the purpose of subdirectories?

    <p>Subdirectories help to categorize and organize files within directories, allowing for better file management.</p> Signup and view all the answers

    What are some advantages of using the shell?

    <p>Some advantages of using the shell include the ability to automate manual tasks, improve productivity, and collect commands into scripts.</p> Signup and view all the answers

    How can you open the Windows command shell?

    <p>The easiest way to open the Windows command shell is to press the keyboard shortcut Win + R, enter 'cmd', and hit Enter.</p> Signup and view all the answers

    Is the Windows shell case-sensitive?

    <p>No, the Windows shell is not case-sensitive.</p> Signup and view all the answers

    How can you view your command history in the Windows shell?

    <p>You can view your command history by typing 'doskey /history' in the shell.</p> Signup and view all the answers

    What are the main functions of an operating system?

    <p>The main functions of an operating system are to coordinate safe and efficient access to system resources, provide abstractions to isolate application programs and users from low-level hardware details, and provide system utilities or commands for universal functions.</p> Signup and view all the answers

    What is the purpose of safe coordination in an operating system?

    <p>Safe coordination in an operating system ensures that only one application program can access a particular system resource at a time, preventing conflicts and ensuring data integrity.</p> Signup and view all the answers

    How does an operating system provide efficient coordination?

    <p>An operating system provides efficient coordination by suspending the execution of programs waiting for input/output operations to be completed, allowing other programs to execute in the meantime.</p> Signup and view all the answers

    What is the benefit of using input redirection in programming?

    <p>The benefit of using input redirection in programming is that it removes the tedium of typing lots of values and allows programs to be automated without waiting for user interaction.</p> Signup and view all the answers

    How does input redirection using a text file differ from manually typing integral values in the shell?

    <p>Input redirection using a text file differs from manually typing integral values in the shell in that it allows the contents of a text file to be used as input to the program, removing the need to manually type the values.</p> Signup and view all the answers

    When is an implicit End-of-File character generated during input redirection?

    <p>An implicit End-of-File character is generated when the program reads the last character in the file.</p> Signup and view all the answers

    What is the purpose of streams in operating systems?

    <p>Streams in operating systems provide a flexible, portable, and efficient means of input and output (I/O). They allow programs to read input data and write output data from a variety of devices without having to handle the details of each individual device.</p> Signup and view all the answers

    What is the difference between a text stream and a binary stream?

    <p>A text stream is a sequence of characters divided into lines, while a binary stream is a sequence of unprocessed bytes that are unreadable using a text editor.</p> Signup and view all the answers

    What are the default I/O streams provided to every program?

    <p>Every program is provided three I/O streams: standard input (stdin) for reading input, standard output (stdout) for writing output, and standard error (stderr) for writing error or diagnostic messages.</p> Signup and view all the answers

    How can input and output redirection be achieved in the Windows shell?

    <p>Input redirection can be achieved by using a redirection operator to redirect input from the default keyboard device to a file. Similarly, output redirection can be achieved by using a redirection operator to redirect output from the default computer screen to a file.</p> Signup and view all the answers

    What is the purpose of the 'cd' command in the Windows shell? Provide an example of how to use it.

    <p>The 'cd' command is used to change directories in the Windows shell. For example, to change the current working directory to the parent directory, the command would be 'cd ..'.</p> Signup and view all the answers

    What is the purpose of the 'mkdir' command in the Windows shell? Provide an example of how to use it.

    <p>The 'mkdir' command is used to create a new directory in the current working directory. For example, to create a new directory named 'folder', the command would be 'mkdir folder'.</p> Signup and view all the answers

    What is the purpose of the 'help' command in the Windows shell? Provide an example of how to use it.

    <p>The 'help' command is used to display built-in help information on a specific command. For example, to get help on the 'chdir' command, the command would be 'help chdir'.</p> Signup and view all the answers

    What is the purpose of wildcards in the Windows shell? Provide an example of how to use them.

    <p>Wildcards are used to specify groups of files whose names have something in common. Two commonly used wildcards are the question mark '?' which represents zero or a single character, and the asterisk '*' which represents zero or more characters. For example, to move all files from the current working directory to a subdirectory, the command would be 'move * subdirectory'.</p> Signup and view all the answers

    What is the role of a shell in an operating system?

    <p>A shell is a text-based CLI program that acts as a command interpreter. It takes commands from the keyboard, passes them to the operating system for execution, and displays the results on the screen. It allows users to efficiently interact with the system by launching programs, running a string of commands as a single command, and automating tasks through scripts.</p> Signup and view all the answers

    Why do programmers prefer using a shell to interact with the operating system?

    <p>Programmers prefer using a shell because it increases productivity and is an important part of the tool chain. It allows them to efficiently interact with the system, launch programs, pipe the output of one command to another, and automate tasks through scripts.</p> Signup and view all the answers

    What is the difference between command-line interfaces (CLIs) and graphical user interfaces (GUIs)?

    <p>Command-line interfaces (CLIs) are text-based interfaces that rely on keyboard input, while graphical user interfaces (GUIs) provide direct user interaction through menus, buttons, and a mouse device. CLIs are preferred by programmers for efficiency and productivity, while GUIs are preferred by ordinary users for their visually intuitive interface.</p> Signup and view all the answers

    Why is experience in Linux beneficial for software developers and engineers?

    <p>Experience in Linux is beneficial for software developers and engineers because it is a free, versatile, and widely used operating system. Linux is present in various systems and devices, such as servers, in-vehicle infotainment systems, consumer electronics, and industrial applications. It is a necessary requirement for most software development jobs and offers opportunities for gaining in-demand job skills.</p> Signup and view all the answers

    Which command should you use to delete directories in Linux?

    <p>rm</p> Signup and view all the answers

    What command should you use to change your current working directory in the Windows shell?

    <p>cd</p> Signup and view all the answers

    What command should you use to quit the Linux shell?

    <p>exit</p> Signup and view all the answers

    Which command can be used to switch from Windows to Linux in the command prompt?

    <p>wsl</p> Signup and view all the answers

    What is the default shell in Linux?

    <p>bash</p> Signup and view all the answers

    Which key is used to bring back the previous command in the Linux shell?

    <p>up-arrow key</p> Signup and view all the answers

    What is the purpose of auto filename completion in the bash shell?

    <p>To autocomplete filenames</p> Signup and view all the answers

    Which command can be used to redirect the output of one program as input to another program?

    <p>pipe</p> Signup and view all the answers

    What does the 'type' command do in the Windows shell?

    <p>Prints the contents of a file to the shell's window</p> Signup and view all the answers

    How can you view the numbers printed to stdout from a program that whizzes by too fast?

    <p>Use piping to redirect the program's output as input to another program</p> Signup and view all the answers

    Which command is used to switch from Windows to Linux bash shell?

    <p>cd</p> Signup and view all the answers

    What command is used to find the current working directory in the bash shell?

    <p>pwd</p> Signup and view all the answers

    What command is used to create a directory in the current working directory?

    <p>mkdir</p> Signup and view all the answers

    Which command is used to display the contents of a text file in the shell?

    <p>cat</p> Signup and view all the answers

    Which programming language was invented in the early '70s to implement the Unix operating system?

    <p>C</p> Signup and view all the answers

    Which programming language was invented by Ken Thompson and Dennis Ritchie for the sole purpose of authoring Unix?

    <p>C</p> Signup and view all the answers

    Which operating system became popular in computer science departments starting in the '70s?

    <p>Unix</p> Signup and view all the answers

    What was the purpose of developing the POSIX standard in the '80s?

    <p>To resolve the portability issue of Unix applications across hardware, operating systems, and vendors.</p> Signup and view all the answers

    Which of the following is a characteristic of Linux operating system?

    <p>It is a variant of Unix</p> Signup and view all the answers

    Which of the following best describes the user interface options in Linux?

    <p>Both plain text using a terminal and through a GUI</p> Signup and view all the answers

    What is the purpose of Linux's basic toolkit?

    <p>To rapidly prototype new tools and programs</p> Signup and view all the answers

    Which operating system is described as the one indispensable core technology of the entire Internet and its modern face, the World Wide Web?

    <p>Linux</p> Signup and view all the answers

    Which of the following is true about the kernel in an operating system?

    <p>The kernel is responsible for managing hardware resources</p> Signup and view all the answers

    What is the purpose of a shell in an operating system?

    <p>To provide a command interpreter for users</p> Signup and view all the answers

    What is the role of system utilities in Linux?

    <p>To provide powerful tools that do a single task extremely well</p> Signup and view all the answers

    What is the purpose of the Windows Subsystem for Linux (WSL)?

    <p>To allow developers to run a Linux environment directly on Windows</p> Signup and view all the answers

    Match the following Linux commands with their descriptions:

    <p>cd = Change the current working directory pwd = Print the current working directory ls = List the contents of a directory mv = Move or rename files</p> Signup and view all the answers

    Match the following Linux directory indications with their meanings:

    <p>. = The current working directory .. = The parent directory / = The root directory ~ = The home directory</p> Signup and view all the answers

    Match the following Linux file manipulation commands with their functions:

    <p>touch = Create a new, empty file cp = Copy files rm = Remove files cat = Concatenate and display file content</p> Signup and view all the answers

    Match the following wildcard characters with their meanings in Linux:

    <ul> <li>= Matches zero or more characters ? = Matches exactly one character [abc] = Matches any one of the enclosed characters [!abc] = Matches any character except those enclosed</li> </ul> Signup and view all the answers

    Match the following commands with their descriptions based on the text:

    <p>cd = Change the current working directory rm -r = Delete directory hierarchies man = Research a command manual exit = Quit the Linux shell</p> Signup and view all the answers

    Match the following command prompts with their actions:

    <p>rm -r = Deleting directories with additional options man rm = Researching command manual for 'rm' cd /dir = Changing current working directory to '/dir' exit = Closing the Linux or Windows shell</p> Signup and view all the answers

    Match the following commands with their usage in the Linux shell:

    <p>cd = Navigating through directories man = Accessing the manual of a command rm -r = Removing directory hierarchies exit = Exiting the shell</p> Signup and view all the answers

    Match the following commands with their corresponding actions:

    <p>Launch a Windows shell and set current working directory to = Starts a command prompt and changes the current working directory stats-win.exe &gt;&gt; output.txt 10 5 20 12 3 8 Ctrl+D 1 2 3 = Runs a program that generates random numbers and redirects the output to a text file type output.txt = Displays the contents of a text file in the command prompt help | more = Displays the help content one page at a time</p> Signup and view all the answers

    Match the following concepts with their definitions:

    <p>Piping = A form of redirection where a program's output is used as input for another program stdout = Standard output, where a program writes its output data Command prompt = A text-based interface used to execute commands Redirection = A process of changing the default data flow direction</p> Signup and view all the answers

    Match the following commands with their effects in the command prompt:

    <p>printints-win.exe 1000 = Generates 1000 random numbers stats-win.exe &lt; input.1 txt &gt; output.txt = Reads input from a text file, executes a program, and redirects the output to another text file C:\sandbox&gt;type output.txt = Displays the contents of a text file C:\sandbox&gt;help | more = Presents the help contents one screen at a time</p> Signup and view all the answers

    Match the following Linux commands with their descriptions:

    <p>wsl = Command to switch into Linux from Windows echo $SHELL = Command to determine the system's default shell cd = Command to change directories in a Linux bash shell cp = Command to copy a file in the Linux bash shell</p> Signup and view all the answers

    Match the following Linux shell features with their explanations:

    <p>Auto filename completion = Completes the filename for you if it is the only one in the current directory that begins with the input sequence of characters Command history = Allows you to navigate through previous commands using up-arrow and down-arrow keys echo $0 = Command to determine the current shell being used . = Can be used to re-execute a previous command from the command history</p> Signup and view all the answers

    Match the following keyboard shortcuts with their actions in the Linux shell:

    <p>Up-arrow key = Brings up the previous command Down-arrow key = Brings back the blank line Ctrl+e = Goes back through the command history Ctrl+y = Repeats a previous command without change</p> Signup and view all the answers

    Match the following directory specifications with their corresponding operating systems:

    <p>/mnt/c/sandbox = Linux C:\sandbox = Windows / = Root directory in Linux C:\ = Root directory in Windows</p> Signup and view all the answers

    Match the following Unix-related events with their corresponding years:

    <p>Unix was first fabricated = 1969 Berkeley Unix added TCP/IP networking features = 1980 The POSIX standard was developed = 1980s Linux was developed = 1991</p> Signup and view all the answers

    Match the following Unix-related terms with their definitions:

    <p>Unix = A popular operating system originating from AT&amp;T Bell Labs C = A high-level programming language invented to implement Unix Berkeley Unix = A variant of Unix developed at the Berkeley campus of the University of California POSIX = A standard developed to resolve the portability issue among different flavors of Unix</p> Signup and view all the answers

    Match the following commands with their functions:

    <p>printints-win.exe = Generate a large set of random numbers in text file stats-win.exe &lt; random.txt = Compute the mean and median of values from a text file printints-win.exe 1000 | stats-win.exe = Generate a large set of random numbers and compute their mean and median in a single step exit = Close the Windows shell</p> Signup and view all the answers

    Match the following organizations and their contributions to Unix development:

    <p>AT&amp;T Bell Labs = Fabricated the first Unix operating system Ken Thompson and Dennis Richie = Rewrote Unix in C Berkeley campus of the University of California = Introduced Berkeley Unix Defense Advanced Research Projects Agency = Requested for the addition of TCP/IP networking features to Berkeley Unix</p> Signup and view all the answers

    Match the following components of a Linux system with their descriptions:

    <p>Kernel = The core of the operating system that provides low-level device, memory and CPU management functions Shell = A text-based command-line interface program that interprets user commands System utilities = Powerful tools that perform a specific task extremely well Application programs = Open-source applications provided by most versions of Linux</p> Signup and view all the answers

    Match the following Linux utilities with their functions:

    <p>grep = Finds text inside files wc = Prints statistics related to the text in a file including the counts of number of words, lines and bytes bash = A command-line shell that interprets user commands GCC = A collection of open-source compilers and interpreters for various programming languages</p> Signup and view all the answers

    Match the following system components with their primary functionalities:

    <p>Kernel = Dealing with interrupts from hardware devices Shell = Takes commands from the keyboard and passes them to the kernel for execution System utilities = Accomplishing universal functions such as printing, text editing, file maintenance, maintaining file permissions Application programs = Providing open-source applications such as text editors, a powerful typesetting language, image viewers, C and C++ compilers</p> Signup and view all the answers

    Match the following shell types with their associated operating system:

    <p>Bourne shell = Linux Korn shell = Linux Bourne Again shell (bash) = Linux Windows Subsystem for Linux (WSL) = Windows</p> Signup and view all the answers

    Match the following operating systems to their respective descriptions:

    <p>Linux = A multi-user, multi-tasking operating system that is hardware independent and supports multiple styles of user interface Orbis OS = Operating system used in PlayStation 4 AIX = IBM's version of Unix Windows = An operating system not initially designed for multi-user, multi-tasking and is specific to certain hardware</p> Signup and view all the answers

    Match the following Linux features to their respective descriptions:

    <p>Multi-user, multi-tasking = Allows multiple users to have multiple tasks running simultaneously Hardware independent = Can function consistently across a heterogeneous mix of computers, vendors, and special-purpose hardware Supports multiple styles of user interface = Can operate in plain text using a terminal or through a Graphical User Interface (GUI) Software development environment = Consists of a toolkit with many system utilities that improve the productivity of programmers</p> Signup and view all the answers

    Match the following Linux components to their respective descriptions:

    <p>Command line languages = Korn shell, Bourne shell are examples and are part of the unchanging basics System calls = Part of the unchanging basics and can be used for decades Software development utilities = &quot;make&quot; is an example and is part of the unchanging basics Networking libraries = Part of the unchanging basics and can be used for decades</p> Signup and view all the answers

    Match the following software types to their descriptions:

    <p>Open-source software = Most active in the Linux world and usually equal to, or superior to, their proprietary equivalents Proprietary software = Not as active in the Linux world and usually not as good as their open-source equivalents Linux = The one indispensable core technology of the entire Internet and the World Wide Web GUI-based operating systems = Operating systems such as Windows 10 and macOS that carry the complexity overhead</p> Signup and view all the answers

    Which compiler(s) will successfully compile the given code without any diagnostic messages?

    <p>GCC and Clang</p> Signup and view all the answers

    Which compiler(s) will not compile the given code?

    <p>ISO C++ compilers</p> Signup and view all the answers

    What is the purpose of using the -std=c11 option with GCC when compiling the code?

    <p>To enable C11 language features</p> Signup and view all the answers

    Which option provides all the warnings about constructions that some users consider questionable, and that are easy to avoid [or modify to prevent the warning]?

    <p>-Wall</p> Signup and view all the answers

    Which option converts diagnostic messages generated by the base compiler and warnings generated by flags and to errors?

    <p>-Werror</p> Signup and view all the answers

    Which option is used to check programs for strict ISO C conformance?

    <p>-Wpedantic</p> Signup and view all the answers

    Which option enables some extra warning flags that are not enabled by -Wall?

    <p>-Wextra</p> Signup and view all the answers

    Which command is used to compile a C source code file using the GCC C compiler?

    <p>gcc</p> Signup and view all the answers

    Which option is used to specify the C11 standard when compiling a C source code file using the GCC C compiler?

    <p>-std=c11</p> Signup and view all the answers

    Which option is used to treat compiler diagnostic warnings as errors when compiling a C source code file using the GCC C compiler?

    <p>-Werror</p> Signup and view all the answers

    What does it mean for a C source code file to compile cleanly?

    <p>It produces no warnings or errors when compiled</p> Signup and view all the answers

    Which of the following statements about the GNU Compiler Collection (GCC) is true?

    <p>GCC can run on most platforms and can cross-compile programs for different systems.</p> Signup and view all the answers

    What are the various stages involved in converting source code into an executable program?

    <p>Preprocessing, compiling, and linking</p> Signup and view all the answers

    Why is it important to have an empty line at the end of a legal C source file?

    <p>It helps the compiler identify the end of the source code.</p> Signup and view all the answers

    Which command should you use to compile and link a C source file in the Linux bash shell?

    <p>gcc -std=c11 -pedantic-errors -Wstrict-prototypes -Wall -Wextra -Werror q.c -o q.out</p> Signup and view all the answers

    What is the purpose of the 'printf' function in C programming?

    <p>To display output on the console</p> Signup and view all the answers

    What is the purpose of stream redirection in programming?

    <p>To redirect program output to a file</p> Signup and view all the answers

    What is the role of system utilities in an operating system?

    <p>To manage system resources</p> Signup and view all the answers

    Which option correctly describes the purpose of compiler warnings in C/C++ programs?

    <p>Compiler warnings indicate possible problems but do not prevent successful compilation.</p> Signup and view all the answers

    What is the consequence of using the incorrect format specifier in a printf statement in C?

    <p>The output may be corrupted or produce unexpected results.</p> Signup and view all the answers

    What is the purpose of the -Wformat= compiler option in C?

    <p>The -Wformat= option converts format warnings into errors.</p> Signup and view all the answers

    What is the recommended approach to handling compiler warnings in C/C++ programs?

    <p>Read and address all compiler warnings to ensure the program functions as intended.</p> Signup and view all the answers

    Study Notes

    Input/Output Redirection

    • Input redirection uses the &lt; symbol in a command prompt.
    • Purpose of input redirection: to redirect input from a file instead of manually typing values in the shell.
    • Difference between input redirection and manual typing: input redirection uses a text file, while manual typing involves typing integral values in the shell.
    • Command to change directories in Windows shell: cd.
    • Example: cd Documents changes the current directory to the Documents folder.
    • Command to create a new directory in the current working directory: mkdir.
    • Example: mkdir MyFolder creates a new folder named MyFolder in the current directory.
    • Period (.) in a relative pathname represents the current working directory.
    • Root directory is represented by a forward slash (/) in a hierarchical file system.
    • Current working directory when in the root directory: /.
    • A path in a file system is the sequence of directories leading to a file or directory.

    Shell and Command Prompt

    • The 'up-arrow' key in the Windows shell: retrieves the previous command.
    • To open the Windows command shell: press the Windows key + R, type cmd, and press Enter.
    • Windows shell is not case-sensitive.
    • To view command history: press F7 or use the doskey /history command.
    • To use the help command: type help to display help for a specific command.

    Operating System and Linux

    • Operating system that powers servers running the web and internet: Linux.
    • Main advantage of Linux: open-source, free, and highly customizable.
    • Benefit of experience in Linux for software developers and engineers: increased marketability and versatility.
    • Main difference between command-line interfaces (CLIs) and graphical user interfaces (GUIs): CLI uses text commands, while GUI uses visual icons and menus.
    • Default shell in Linux: bash.

    Streams and File Systems

    • A stream in operating systems: a sequence of bytes or characters.
    • Default device for standard output: screen (stdout).
    • Purpose of redirection operators: to redirect input/output streams.
    • End-of-File (EOF) character: indicates the end of input.
    • Hierarchical file system: a file system organized as a tree of directories.

    System Utilities and Coordination

    • Purpose of system utilities or commands: to manage system resources and provide safe coordination.
    • Purpose of safe coordination: to manage and allocate system resources efficiently.
    • Benefit of using input redirection: reduces manual errors and increases efficiency.
    • Operating system manages system resources: CPU, memory, I/O devices, and files.

    Unix and Linux History

    • Programming language invented for Unix: C.
    • Operating system that became popular in computer science departments in the '70s: Unix.
    • Purpose of developing the POSIX standard in the '80s: to standardize Unix-like operating systems.
    • Characteristic of Linux: open-source, free, and highly customizable.
    • User interface options in Linux: CLI, GUI, and TUI (text-based UI).

    Miscellaneous

    • Command to delete directories in Linux: rm -r.
    • Command to quit the Linux shell: exit.
    • Command to switch from Windows to Linux bash shell: wsl.
    • Auto filename completion in the bash shell: automatically completes file names based on user input.
    • Command to redirect output of one program as input to another: |.
    • Purpose of the Windows Subsystem for Linux (WSL): to run Linux on Windows 10.

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    Mastering Windows Command Prompt: Navigating Directories, Deleting Subdirectories, and Closing the Shell

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