Math Lab Frequently Asked Questions


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Question:
 I can't log in.  I get a DCOP error message.  What happened?
Answer: You have exceeded your disk quota.  The most likely cause is the Mozilla Firefox cache.  Even if that's not the case, you need to delete some files before you will be able to log in again.  How do I delete files if I can't log in, you ask?  Try this first:

Log in to Windows.  If you can't, have someone log into their Windows account for you.  You do not need to use your account to do this.  Start a Cygwin bash shell.  It is found in the Start menu under Open Source:



Type in the command  ssh username@newton.mat.owlnet  where username should be replaced by your MySCSU username:

If you are asked if you are sure you want to do it, type yes and hit Return.

You will be asked for your password.  Use your MySCSU password.  Note that you will not see anything appear on your screen as you type.  Don't worry.  Just hit Return when you are done.

Type in the command  find . -name Cache -exec rm -rf \{\}/* \;  EXACTLY as shown, including capitalization and all spacing and punctuation.

To see if this worked, try logging into Linux now.  If you can, follow the instructions in the FAQ page How do I change the maximum cache size in Firefox? to prevent it from happening again.

If you still can not log in, you are still exceeding your disk quota.  Using the Windows Explorer (in your Windows login) delete some of your largest files.  You must delete enough that your disk usage drops below your quota (most likely 50 MB).

Related:  How do I change the maximum cache size in Firefox?
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Please send any questions or comments to brinl1@southernct.edu