intro unix/linux 01
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intro unix/linux 01

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logging on to the system

logging on to the system

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    intro unix/linux 01 intro unix/linux 01 Presentation Transcript

    • Lesson 1-Logging On to the System
    • Overview
      • Importance of UNIX/Linux.
      • Logging on to the system.
    • Importance of UNIX/Linux
      • Most Internet servers and all the fundamental computing structures run on UNIX/Linux systems.
      • Most communication networks run on UNIX/Linux systems.
      • The general infrastructure for communications, programs, smart devices, and critical data is managed on UNIX/Linux systems.
    • Importance of UNIX/Linux
      • Records, research, communication, development, and publications depend on applications provided by UNIX/Linux systems.
      • File serving for desktops, e-mail, and an enormous portion of publishing run in UNIX/Linux environments.
    • Logging On to the System
      • The UNIX system’s ability to serve multiple users at a time is one of its primary features.
      • A unique account associated with a login name is created when an administrator adds a new user to a system.
      • Entry to the UNIX system is granted only if the user provides a login name and a password that match an established user on the system.
      • A user having a ‘root’ login is granted the extensive powers needed to administer the system.
      Logging On to the System
    • Logging On to the System Character Window Log On Screen
    • Logging On to the System Terminal Window Log on Screen
    • Logging On to the System
      • Ensure that the username and password is entered using the correct character-case, since UNIX/Linux is case-sensitive.
      • In most systems, the login name and the password are in lowercase letters.
      • Passwords are not displayed on the screen.
      • Care should be taken to avoid typing mistakes.
      • Confusion between similar looking characters should also be avoided. For example, the alphabet O and the number zero (0).
      Logging On to the System
    • Logging On to the System
      • Terminal Window interaction
      • Graphical Window interaction
    • Terminal Window Interaction Terminal Window Screen
    • Terminal Window Interaction
      • The “date” command is used to display the current date and time.
      • The “exit” command is used to log off from the terminal environment.
    • Graphical Window Interaction Graphical Window Screen
    • Graphical Window Interaction Logoff in Graphical Window Interface
    • Summary
      • A valid username and a password are required to access a UNIX/Linux system.
      • The root user has the extensive powers needed to administer a UNIX/Linux system.
      • A user can log in from the terminal Window or the graphical Window.