CUNY CSCI 132 - Logging In and Out (38 pages)

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Logging In and Out



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Logging In and Out

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Lecture Notes


Pages:
38
School:
The City University of New York
Course:
Csci 132 - Practical Unix Programming

Unformatted text preview:

Getting Started Logging In and Out Copyright 2006 Stewart Weiss Getting started logging in and out Every user in UNIX has a username also called login name or account name and a password Logging in requires that you enter your username and password Your username and initial password are given to you by the system administrator 2 CSci 132 Practical UNIX with Perl Logging in from a terminal window 1 You have to identify yourself by typing your username at the login prompt login and then your password at the password prompt login stewart Password When you type the password you won t see the cursor move until you press the Enter key 3 CSci 132 Practical UNIX with Perl Logging in from a terminal window 2 If you enter either your username or password incorrectly you will see this message login incorrect login and you will have to repeat the previous steps Usernames are case sensitive You have to type them exactly as they are given to you 4 CSci 132 Practical UNIX with Perl Logging in from a terminal window 3 If you are successful you will see a message like this Last login Mon Jun 26 21 32 48 You have new mail The is called the shell prompt It is the indication by UNIX that it is waiting for you to enter a command 5 CSci 132 Practical UNIX with Perl Changing your password 1 When you login for the first time you must change your password No exceptions Type the command passwd at the prompt Note that it is password without the or You will be asked to enter the current password and then asked for the new password twice If you make any mistakes the password will not be changed 6 CSci 132 Practical UNIX with Perl Changing your password 2 The session will look something like this passwd Changing password for user sweiss current UNIX password you type here New UNIX password you type here Retype new UNIX password you type here passwd password has been changed 7 CSci 132 Practical UNIX with Perl About passwords Your password must be difficult to crack Some rules to follow 8 Must be



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