2. Engineering H192 - Computer Programming Gateway Engineering Education Coalition Lect 4P. 1Winter Quarter Introduction to UNIX Lecture 4

3. Engineering H192 - Computer Programming Gateway Engineering Education Coalition Lect 4P. 2Winter Quarter Computing Environment PC vs. UNIX –Many PCs use a version of the Microsoft Windows operating system (either 95/98/ME or NT/2000/XP). –UNIX is an operating system used primarily on workstations. There are versions for Personal Computers. LINUX is a version of UNIX.

4. Engineering H192 - Computer Programming Gateway Engineering Education Coalition Lect 4P. 3Winter Quarter UNIX Originally written by programmers for programmers at Bell Labs. Often is the operating system of choice for high- performance engineering workstations. Original (and still common) user interface is the "UNIX command line", although graphic user interfaces (GUIs) are available. Names of UNIX commands tend to be a little cryptic or strange.

5. Engineering H192 - Computer Programming Gateway Engineering Education Coalition Lect 4P. 4Winter Quarter UNIX Command Line Interface We will use the "UNIX command line" user interface for much of the work in this class. The availability of some limited graphic user interface capabilities is provided by special terminal emulation software. Emulator runs on the PC and makes the PC system act like an "X-Windows" terminal. Simple Secure-Shell terminal emulation can also be used.

6. Engineering H192 - Computer Programming Gateway Engineering Education Coalition Lect 4P. 5Winter Quarter Some Simple UNIX Commands

7. Engineering H192 - Computer Programming Gateway Engineering Education Coalition Lect 4P. 6Winter Quarter Your Computer Accounts Each student actually has two separate computer system accounts: –One for the personal computers (in HI 324) –One for the UNIX system (SGI IRIX) Each account is established only for the duration of the current quarter (i.e., the files stored under your Autumn Quarter's account(s) are gone)

8. Engineering H192 - Computer Programming Gateway Engineering Education Coalition Lect 4P. 7Winter Quarter Your User ID and Default Password The User ID for both of your computer accounts is simply your OSU email ID. The default password for both accounts is: –The first letter of your last name –The first three digits of your SSN in reversed order –Your entire first name Written as one "word" in all lowercase

9. Engineering H192 - Computer Programming Gateway Engineering Education Coalition Lect 4P. 8Winter Quarter Figuring out Your ID & Default Password So, as an example of a User ID and a default password, let's suppose: –Your name is "Woody Hayes" –Your SSN is 987-65-4321 –Your OSU email address is hayes.1@osu.edu Then, Wayne Woodrow "Woody" Hayes would logon as: –User ID:hayes.1 –Password:h789wayne

10. Engineering H192 - Computer Programming Gateway Engineering Education Coalition Lect 4P. 9Winter Quarter Default Logon for PC Systems in HI 324 Your UNIX "default" password: –The first letter of your last name –The first three digits of your SSN in reversed order –Your entire first name Another possible default password: –Just your University ID (your 9-digit SSN) Attempt both of these methods and if neither work speak to the lab facilitator at the desk in 324 or your instructor.

11. Engineering H192 - Computer Programming Gateway Engineering Education Coalition Lect 4P. 10Winter Quarter Logging On to a PC in HI 324 Windows XP Logon Press “Ctrl - Alt - Del”, if so instructed Fill in the new window with –Your User ID –Your Password (watch case) –The Domain (ENGR1)

12. Engineering H192 - Computer Programming Gateway Engineering Education Coalition Lect 4P. 11Winter Quarter Logging On to the PC User Name Password Domain hayes.1 h789wayne ENGR1

13. Engineering H192 - Computer Programming Gateway Engineering Education Coalition Lect 4P. 12Winter Quarter Changing Your Password on the PC (Press Ctrl -- Alt -- Del) Windows XP Security Login Information CancelChange Password Log Off

14. Engineering H192 - Computer Programming Gateway Engineering Education Coalition Lect 4P. 13Winter Quarter Changing Your Password on the PC Domain User Name Change Password Old Password New Password Confirm New Password

15. Engineering H192 - Computer Programming Gateway Engineering Education Coalition Lect 4P. 14Winter Quarter Logging On to the SGI UNIX System On the PC -- –Click on Start Go to Programs Submenu –Then go to Exceed Submenu »Then go to Exceed (Task) and Click

16. Engineering H192 - Computer Programming Gateway Engineering Education Coalition Lect 4P. 15Winter Quarter Today's Assignment – E3 In assignment E3, you are asked to logon on to the UNIX system and try a few commands. In Part A, write down the command you typed for each of the seven steps. In Part B, choose an editor program and type in the given computer program. UNIX editor choices include: –vedit (or vi)– pico –emacs (X only)