If you need to add a passphrase to an existing key, use the following command:

 $ ssh-keygen -p

You will be prompted for the name of the file in which the key is. Unless you have multiple keys, the default should be fine. Enter a passphrase that is easy to remember but hard to figure out. Be sure to use something you can remember, because if you forget the passphrase, the key is useless. 

Next, copy the contents of ~/.ssh/id_rsa.pub to the file ~/.ssh/authorized_keys

Now, when you ssh between CS machines, your ssh key will be used, instead of password authentication.

Note: If you are a TA who needs access to a class account via SSH keys, please see our FAQ entry SSH access to CS class accounts for Teaching Assistants.

1. Log in using your CS account and make sure you are in your home directory. If you do not have a CS account, but are enrolled in at least one CS course during the current quarter, please email help@engineering.ucsb.edu and request an account.
2. Create a directory called "public_html."
3. In that directory, create a text file that will contain the information that is displayed on your home page. The web server supports both html and php, so you can name this file "index.html" or "index.php".
4. Make sure that your directory and .html and/or .php files are world-readable, by running the following commands:
   
   chmod 755 public_html
   chmod 644 public_html/index.html
   
   Also, make sure that your home directory is world executable; if not, use the follwing command:
   
   chmod o+x $HOME

You can now access your web home page via the URL:

"http://www.cs.ucsb.edu/~login/" where "login" is your login name.

The web server supports PHP and javascript (no cgi-bin).

More Resources

• Tryit Editor v1.5 Pretty good simple HTML practice tool.
• The Web Developer's Virtual Library offers dozens of links to tools that will add depth to your web site, such as scripting languages, multimedia, forms, image maps, etc.
• Java Resource List Links to online tutorials, FAQs, great web sites, Java information collections and indices, news and message exchanges, publishers and other Java info providers, products, conferences, and more!

• Converters To and From HTML lists a number of downloadable utilities for specific programs.

  If you don't have the time or interest in learning HTML, you don't really have to. Use a WYSIWYG HTML editor like Netscape Composer (multiple platforms), Adobe PageMill (Mac and PC) or Microsoft FrontPage (PC) to create your homepage. Also, many computer applications are beginning to incorporate a save-as-HTML feature, so check and see if your favorite program allows automatic conversion to HTML.

What is the MSDN Academic Alliance?
Who is eligible to download software through the MSDN-AA?
What products and services are included in the MSDN-AA membership?
Does the membership include Office and FrontPage?
Where can I get this software?
Where can I get help with / more information about MSDN-AA?

What is the MSDN Academic Alliance?

The MSDN Academic Alliance is an annual membership program for the Computer Science department. As a member, the department receives an MSDNAA subscription that Microsoft platform, servers, and developer tools software. This software may be installed on any number of departmental lab machines. The software must be used for instructional and research purposes, it may not be used to run the infrastructure of the department. In addition, the department"s faculty and students may check-out or download the software to install on their personal computers.

The program has two primary goals: 1) to make it easier and less expensive for you to obtain Microsoft developer tools, platforms, and servers for instructional and research purposes and 2) to build a community of instructors who can share curriculum and other learning resources to support the use of these technologies.

Who is eligible to download software through the MSDN-AA?

Our license allows the following individuals to install MSDN-AA software on their personal computers for use in coursework and personal non-commercial projects:

• Students taking at least one for-credit course offered by the member department
• Faculty members of the member department
• Staff directly responsible for administering the MSDNAA program

If you are not in one of these groups, don't despair. Contact your department to find out if they have their own MSDN-AA contract and if you are eligible to use it.

What products and services are included in the MSDNAA membership?

• Visual Studio .NET Professional (including Student and Faculty Tools)
• Windows XP, Windows 2000, and other Microsoft operating systems
• .NET Enterprise Servers: Windows servers, SQL Server, Exchange Server, Commerce Server, BizTalk Server, Host Integration Server, Systems Management Server, Sharepoint Portal Server, and several others
• Microsoft Project Professional
• Microsoft Visio Professional
• Software development kits (SDKs), betas, new releases, and updates
• Development tools for Windows CE

Does the membership include Office and FrontPage?

No, the membership does not include Office or FrontPage. The focus of the MSDN Academic Alliance is on providing departments, faculty, and students with the tools necessary for specialized research and study in software development and testing. Thus, Microsoft provides products and technologies such as Windows XP, Visual Studio .NET, SQL Server, and Platform SDK.

Office and FrontPage are not in line with these specific goals, since the program is primarily focused on high-end technologies rather than basic web design and consumer applications. Note: the MSDN Library does include developer documentation for Office.

The department has entered into the UC MCCA agreement with Microsoft. Our agreement covers Office (all versions, including Mac) for the faculty, lecturers, and staff. Unfortunately, we could not cover the Graduate students or researchers as this proved cost-prohibitive. People not covered by the MCCA agreement may obtain Office and other products at academic discounts through either the Campus Bookstore or Software Depot.

Where can I get this software?

All software is available through the MSDN-AA website. The URL is: https://msdn07.e-academy.com/ucsb_cs/. The MSDN-AA site offers two options for obtaining software:
1) direct download
2) postal delivery (fees may apply)

Where can I get help / more information about MSDN-AA?

Please read the MSDN-AA FAQ before contacting either MDSN-AA support or CS Support. Additional information about the MSDN-AA program can be found at their website: http://www.msdnaa.net/.

A open source SSH client is available called putty .

Search in their respective FAQs for more information.

For Linux or Unix machines, you can view your current disk usage and quota by executing the following command:

Finding Out if You Are Over Quota

quota –v

You should see output similar to this:

Disk quotas for user test_user (uid 65331):
Filesystem blocks quota limit grace files quota limit grace
/filesys 140732 200000 210000 4362 20000 21000

There are two resources limited by our quota systems: disk space and number of files. Disk space used is listed under "blocks," with the corresponding limits listed after it under "quota" and "limit." Your number of files used is listed under "files," with the quota also following. If either your disk space or number of files used is greater than the "quota" (soft limit) or "limit" (hard limit) you should attempt reduce your resource usage.

Determining Your Current Disk Space Usage
When in your home in directory, use the command:

du –sk * .??* | sort –rn | head

to see a list of your 10 largest files or directories (biggest displayed first). This command also works from within sub-directories allowing you to get a finer-grain view of usage. You can judge which are good candidates to delete or compress.

 Please note: You cannot copy and paste this command. You must type it in by hand.

Determining Your Current File Usage

When in your home directory, use the command:

/usr/local/bin/countfiles

to see your 10 directories with the most amount of files in them. This command also works from within sub-directories allowing you to get a finer-grain view of usage. You can judge which are good candidates to delete or archive.

Removing/Archiving Files and Directories

When near or over quota, look for your cache (or temporary files) in your web browser. These unneeded and space gobbling cache (or temporary) files are often the worst offenders. They can best be deleted from within your browser program. If you use Mozilla Firefox, click here for more information. 

Delete any core dump files when you are finished analyzing them.

Your user interface can also produce extraneous cache files. They are located in the hidden subdirectories, .kde/share, .gnome/share. You can examine all of your hidden files, when in your login directory, with the command: ls –la | more

You can also combine multiple files into one (archive) and compress large files to reduce your file and space usage. The "tar" program takes many files and turns them into one. To learn more about it type "man tar." The "gzip" program is used to compress files in size. Type "man gzip" to learn more about it. Also there are many tutorials available on the web, google "tar gzip" to find some.

Troubleshooting Problems

If you believe that the quota program is not accurately listing your current disk usage you can run the following command from within your home directory:

du . -s

it will give you a quick summary of current disk usage.

SImilarly the count files program (/usr/local/bin/countfiles) will give a total of all the files in the current directory.

If either of these counts are different from that listed my teh quota program, please email support at cs.ucsb.edu.