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intro unix/linux 01
intro unix/linux 01
intro unix/linux 01
intro unix/linux 01
intro unix/linux 01
intro unix/linux 01
intro unix/linux 01
intro unix/linux 01
intro unix/linux 01
intro unix/linux 01
intro unix/linux 01
intro unix/linux 01
intro unix/linux 01
intro unix/linux 01
intro unix/linux 01
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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  • 1. Lesson 1-Logging On to the System
  • 2. Overview <ul><li>Importance of UNIX/Linux. </li></ul><ul><li>Logging on to the system. </li></ul>
  • 3. Importance of UNIX/Linux <ul><li>Most Internet servers and all the fundamental computing structures run on UNIX/Linux systems. </li></ul><ul><li>Most communication networks run on UNIX/Linux systems. </li></ul><ul><li>The general infrastructure for communications, programs, smart devices, and critical data is managed on UNIX/Linux systems. </li></ul>
  • 4. Importance of UNIX/Linux <ul><li>Records, research, communication, development, and publications depend on applications provided by UNIX/Linux systems. </li></ul><ul><li>File serving for desktops, e-mail, and an enormous portion of publishing run in UNIX/Linux environments. </li></ul>
  • 5. Logging On to the System <ul><li>The UNIX system’s ability to serve multiple users at a time is one of its primary features. </li></ul><ul><li>A unique account associated with a login name is created when an administrator adds a new user to a system. </li></ul>
  • 6. <ul><li>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. </li></ul><ul><li>A user having a ‘root’ login is granted the extensive powers needed to administer the system. </li></ul>Logging On to the System
  • 7. Logging On to the System Character Window Log On Screen
  • 8. Logging On to the System Terminal Window Log on Screen
  • 9. Logging On to the System <ul><li>Ensure that the username and password is entered using the correct character-case, since UNIX/Linux is case-sensitive. </li></ul><ul><li>In most systems, the login name and the password are in lowercase letters. </li></ul><ul><li>Passwords are not displayed on the screen. </li></ul>
  • 10. <ul><li>Care should be taken to avoid typing mistakes. </li></ul><ul><li>Confusion between similar looking characters should also be avoided. For example, the alphabet O and the number zero (0). </li></ul>Logging On to the System
  • 11. Logging On to the System <ul><li>Terminal Window interaction </li></ul><ul><li>Graphical Window interaction </li></ul>
  • 12. Terminal Window Interaction Terminal Window Screen
  • 13. Terminal Window Interaction <ul><li>The “date” command is used to display the current date and time. </li></ul><ul><li>The “exit” command is used to log off from the terminal environment. </li></ul>
  • 14. Graphical Window Interaction Graphical Window Screen
  • 15. Graphical Window Interaction Logoff in Graphical Window Interface
  • 16. Summary <ul><li>A valid username and a password are required to access a UNIX/Linux system. </li></ul><ul><li>The root user has the extensive powers needed to administer a UNIX/Linux system. </li></ul><ul><li>A user can log in from the terminal Window or the graphical Window. </li></ul>

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