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Basic

§ 0: Using this Tutorial

Navigation

It is recommended that you do NOT use the Netscape Forward and Back buttons once you start using this tutorial. Their use, as well as the use of the Go button may lead to confusion.

There are two ways to maneuver in this document. The navigator frame on the left contains the table of contents for the current section of the document. You can click on any link in it and go directly to that section. The main frame will frequently contain links to related information, and you can follow these links as well. Occasionally, one of these links will lead you to information contained in another set of documents. If this occurs, the information will be brought up in a separate window, and possibly in a different color.

In addition to the ordinary links in the main frame, most documents contain several buttons. The buttons labeled "Next" and "Previous" take you to the next and previous pages respectively. "Next" and "Previous" in this case refer to the logical flow of the tutorial, like a book, in contrast to jumping between former and latter pages as occurs with a Web browser like Netscape. The "Up" button in a tutorial takes you back to the introductory section, while the "Contents" button takes you to the Table Of Contents.

Passwords

At the beginning of each semester, a JCCL account with your username assigned by FIU UTS is created for any student taking at least one computer class. This account has two sides, one for Windows XP and one for Unix/Linux.

The initial password for both unix and WinXP accounts in the JCCL is set to the initial of your first name, your panther ID and the initial of your last name. Both initials are lower case.

You will need to change your password on your first login. Changing your unix password does not affect your XP password, and vice-versa.

Using ssh

If you've heard about or used telnet, you will probably be delighted to learn that it also has a secure "twin" known as ssh. To activate ssh from the XP-machines in the lab, click Start -> Programs -> Applications -> Terra Term Pro. If you're at home, you can still download Terra Term, but be sure to also download the ssh-extension.

Once you've got the Terra Term screen, type computerofchoice.aul.fiu.edu into the Hostname field where "computerofchoice" can be havana, madrid, quebec, ocelot, paris (non computer science students can put solix.fiu.edu in the Hostname field instead) and make sure you select "SSH" as your type of connection. Hit "Connect" or "Ok" or whatever looks like it might work. The screen should then show several informational messages, and finally respond with the prompt:

If you are a registered user at FIU in general and of the JCCL in particular, you have been given a userid by solix, and that's what you need to enter now.

Note: you must type in your userid and commands exactly as they appear here, the exception being that you can add additional spaces if you feel like it. But remember: Unix is case sensitive and this means upper and lower case letters are considered to be different.

You should now have the prompt:

Go ahead and enter the "Unix password" dicussed above (either your social security number without dashes, or whichever password you had on solix at the beginning of the current term). Make sure Caps Lock isn't on, unless your password is all uppercase. You can try backspacing if you think you made a mistake, but if that doesn't help, you should just be prompted again after a little while. In case none of your passwords work, go to ECS 258 (the Systems Group) for assistance.

Using XWin32

In the lab, you also have the chance to use XWin32 on the XP machines. To use XWin32, click Start -> Programs -> Applications -> XWin32. You should now be presented with a screen that looks sort of gaze-like and has a little window in its upper left corner telling you which machines are "willing to manage" your session.

If you got the big screen, but not the little window, there's no need to despair. Simply rightclick on the XWin32 icon in the Windows taskbar, or on the titlebar of the XWin32 screen. A dropdown menu will appear. Leftclick on Sessions, then choose XDMCP. This will make the little window appear.

Select weasel from the list, then click Ok. You will now be presented with a login screen that requires the same information as described for an ssh session above. So, even though you are sitting at an XP machine, you will have to type your "Unix password" to log into the Unix-machine weasel. And just like in an ssh session, you have to hit the [Enter] key after your username; hitting [Tab] instead will put your password right after your username, so it can be seen by anyone who's interested. If your login gets accepted, but the background does not change after about 20 seconds, kill your current XWin32 session either through the Task Manager ( Alt + Ctrl + Del, click the Task Manager button ), or try rightclicking on the XWin32 icon or titlebar and choose Close from the menu. Then call up XWin32 anew, and try once more. If you still don't get a changed background and a couple little icons, please see a lab assistant for help. XWin32 is great program, but it does have its bugs and moods.

If you're successful, all you need to do now is get yourself a shell. The shell is the interface that lets you type commands at weasel, just like you do when you ssh into it. (You could also compare it to the DOS prompt). To get a shell, you simply rightclick anywhere on your desktop. This will bring up an applications-menu, and the shell is "diguised" as XTerm; it should be the third from the top. Click on XTerm, and there's you shell! Ideally, it will have a prompt awaiting your commands, that looks somewhat like this:

In case you got one that looks more like you probably accidentally deleted you Unix-environment files that lived in your U drive the first time you logged on many, many moons ago. Go to ECS 258 (your friendly systems group) and ask them to restore your Unix environment.

Note, however, that the lefthand-most greater-than symbol > preceeding a command does serve a purpose in this and most other tutorials: it is used as a generic prompt.

If you feel really adventurous, you can also log into one of the Linux machines. The login procedure and your password are exactly the same as when establishing an XWin32 session; however, you won't have the comfort of returning to the safety of Windows when unexpected things happen.

Once you've weathered all these adversities, you are almost ready to start this tutorial. There's just one little ittybitty thing left:

Tutorial Files

To get the expected results when you type in commands, you will need to copy some tutorial files to some of your personal disk space on the computer. To create the files the tutorial uses, enter the following commands just as they are written here (they are also explained just below):

cd SPACE ~
will ensure that you are in your home directory which is equivalent to your U: drive. Wherever you are in the directory tree, entering cd ~ will always bring you back there.
cp SPACE -ir SPACE /depot/http/data/support/unix/tutorial-directories/* SPACE .
Make sure to put the period! This command will perform an interactive copy, and it will copy recursively; i.e., there are some directories with more files in them, and the recursive copy ensures you'll get them all. That little period is quite important; it tells Unix to copy those files to your home directory. Like in DOS, . indicates the current directory, which in this case is your home directory and the destination parameter for the copy command. If Unix responds with:

then you enter "n". If you enter "y", your files may be damaged.

How Much do I Need to Know?

Basic If your goal is to "just get started on the system", you only need to complete the basic sections identified by the red car. Specialized The sections identified by the race car are somewhat more advanced or specialized (and more fun).


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Comments and questions to request@cs.fiu.edu.