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Linux

Linux is an open-source operating system based on the Unix architecture, widely used for its stability, security, and flexibility. It powers servers, desktops, and embedded systems, offering A wide range of distributions like Ubuntu, Fedora, and CentOS.

Command Line Interface

CGI (Common Gateway Interface) is A protocol used to enable interaction between web servers and external programs, allowing dynamic content generation on websites.

Graphical User Interface

GUI (Graphical User Interface) is A visual interface that allows users to interact with Ad system or software through graphical elements like windows, icons, and buttons, instead of using text-based commands.

Windows uses GUI where Linux uses both CLI & GUI.

Linux Commands

  • pwd : Gives Information of on what directory you are right now. (Parent)

  • ls : Gives what your current pwd directory contains. (Childrens)

  • mv : Move Command
    Example : mv txt1 folder/

    This command Move txt1 inside folder file

  • cp : Copy Command
    Example : cp txt2 folder/

    This command Copy txt2 inside folder file

  • cd : Used when we need to enter inside some other directory. Example : cd <directory>

    Through this command we can enter inside desired directory. You can use ls Command afterward to Go inside <directory> directory.
    You can use cd .. Command afterward to goto home directory.

  • mkdir : used to make directory.
    Example : mkdir fl

    through this command you can make directory inside or outside your directory.

Types of Users :

  1. Root User : Controls Terminal as Admin.
  2. Regular User : A regular user with limited access.

To use terminal as Admin use command sudo su .