Agenda Overview of Seneca Computer System –File Servers / Student Computer Accounts –Telnet application –How to Logon to Learn / Phobos accounts How to Change your Password Basic Unix Commands –pwd –ls (Various Options)

Computer Networks Personal computers that are not connected to other computers (via network cards) are referred to as “stand-alone” computers. Institutions such as colleges find it more economical and efficient to connect up personal computers to form a computer network

Computer Network File Server (Central Computer) Terminal (Client)

File Server A file server is a powerful centralized computer system with an operating system that allows multiple users to access software applications and data files. The file server may also provide other important services such as network printer management and connection to other networks (Internet)

Computer Networks Computers connected to form a network over small geographic locations (such as a building or city) are referred to as Local Area Networks (LANs) Local Area Networks can use modems or routers to connect up to other LANs from far distances to form Wide Area Networks (WANs)

Advantages of Computer Networks Economical –Ability to share hardware devices such as printers and scanners Efficient –Ability to communicate among users –Efficient method to maintain and upgrade software (I.e. one copy of software on file server - therefore, only upgrade one location) –Ability for users to share files

Seneca Computer Network Newnham Campus Modem Pool Newnham Campus SIRUS LEARN MERCURY Remote Users Internet Campus T1

Seneca Computer Network Campus Newnham Campus T1 PHOBOS(RS6000) VISION “ CS “ PANDORA LINUX

Relevant Servers LEARN –Used to read and send . Phobos password will be ed to this account PHOBOS –Computer account used for creating, modifying, compiling and executing programs VISION –Used to store and maintain a student webpage. Need to request permission for account

Steps to Logon to PHOBOS Access Sirus from web browser Complete Sirus screen to generate LEARN & PHOBOS accounts Setup / Read in LEARN to obtain PHOBOS account name & password Telnet to Phobos account - Read and record VISION password

Steps to Logon to PHOBOS Logon to SIRIS to create account. Change Learn password. Remember to use your 5 digit PIN number to logon to SIRIS.

Steps to Logon to PHOBOS Setup & access LEARN via Netscape to check to determine your PHOBOS username and password. Logout of LEARN account Logon to PHOBOS account via telnet application. Change password and LOGOUT of PHOBOS account.

Setup Netscape to Access LEARN mail Launch Netscape, point and click onto EDIT menu and point and click onto preferences

Setup Netscape to Access LEARN mail Point and click onto the plus sign to the right of the “Mail & Newsgroups” category: this will expand the selection. Point and click onto Identity

Setup Netscape to Access LEARN mail If you are using Netscape at the Seneca College labs, you will have to type in the following information for every new session: –Your name –Your LEARN address

Setup Netscape to Access LEARN mail Point and click onto “Mail Servers”, and enter the following information: –Mail server user name: type your username –Outgoing mail: type learn.senecac.on.ca –Incoming mail: type learn.senecac.on.ca Make sure that Mail server Type is set to IMAP (Select the option “move deleted messages in trash”) Point and click onto OK

Setup Netscape to Access LEARN mail

How to Read via Netscape Point and click onto the mailbox button: Point and click onto the New Message button to read your

How to Read via Netscape You will required to enter your LEARN password (not the 5 digit number, but actual LEARN password you created in SIRIS) WARNING: –Make sure to close Netscape after reading your messages; otherwise, people can read your and send with your address.

How to Logon to PHOBOS Server Run Telnet Program Type in your Login I.D. Type in your password Note:For first time-users, you must go to Siris, create a learn account, read message in LEARN account via Netscape regarding PHOBOS username & Password

What is the Telnet Application? Unix systems such as PHOBOS were originally designed to accommodate “dumb terminals” which were simply monitors and keyboards directly connected up to network Telnet allows the server to “think” that the user’s personal computer is a “dumb terminal” A common type of “dumb terminal” was Digital Equipment corporation’s VT100.

Telnet Application To launch or “run” the Telnet application from the Seneca computing lab, point and click onto the application “telnet” on the Windows 95 desktop You can obtain a free version of Telnet application for home use (assuming you have computer system with modem). More details in following lessons

Protecting your Computer Accounts It is important to assign an appropriate password to prevent unauthorized access to your computer accounts. Concerns regarding unauthorized use: –Illegal Activity –Suspension of account –Loss of data / Copying of assignments

Password tips Avoid easily detected passwords such as names or a series of numbers. Use phrases and take the first letter of each word For example: Autumn leaves Turn red, yellow, orange

Password Tips Combine upper and lower cash letters Include a non alpha-numeric characters such as. - in your password Acceptable passwords on PHOBOS and LEARN range from 6 to 8 characters

Changing your Password After logging onto PHOBOS, you can change your password by typing at the $ prompt: passwd Note: It is recommended to change password periodically.

Basic Unix Commands Listing Files: lsDisplays compact list of files (excluding hidden files - beginning with period) ls -aDisplays all files (including hidden files) ls -lDisplays detailed list of files (excluding hidden files) ls -alDisplays all files in detail form (including hidden files)

Homework Create an acceptable password using the above-mentioned techniques. Be prepared to change your password in next computer lab.