Lesson 1-Logging On to the System. Overview Importance of UNIX/Linux. Logging on to the system.
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Transcript of Lesson 1-Logging On to the System. Overview Importance of UNIX/Linux. Logging on to the system.
![Page 1: Lesson 1-Logging On to the System. Overview Importance of UNIX/Linux. Logging on to the system.](https://reader035.fdocuments.net/reader035/viewer/2022062804/56649efb5503460f94c0e3cf/html5/thumbnails/1.jpg)
Lesson 1-Logging On to the System
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Overview
Importance of UNIX/Linux.
Logging on to the system.
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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.
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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.
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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.
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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
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Logging On to the System
Character Window Log On Screen
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Logging On to the System
Terminal Window Log on Screen
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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.
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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
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Logging On to the System
Terminal Window interaction
Graphical Window interaction
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Terminal Window Interaction
Terminal Window Screen
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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.
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Graphical Window Interaction
Graphical Window Screen
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Graphical Window Interaction
Logoff in Graphical Window Interface
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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.