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POWERDOWN – 6pm – 12/19/2022 – FAB/EB power testing again

This power down is to allow PSU facilities and their contractors to perform some fine tuning of the new FAB/EB power control system that was installed in September. The night of Monday, December 19th, is the primary outage period. It may last from 6pm on Monday evening all the way until 6am on the following [...]

2022-12-01T02:31:02-08:00November 30th, 2022|

Run cpu/memory/disk intensive assignments on babbage

CS Users! Please run resource heavy programs on babbage.cs.pdx.edu  - not ada (linux.cs.pdx.edu). Some clarification of the lore about ada and babbage, the two primary multi-user Linux systems available to CS students.  ada.cs.pdx.edu (aka linux.cs.pdx.edu) Used as a general workhorse.  Designed to handle users going through the edit - compile - execute cycles of general [...]

2022-10-10T22:54:16-08:00October 10th, 2022|

News for new and returning MCECS computer users in Fall 2022

The CAT has been busy preparing the computing infrastructure at MCECS for both onsite and remote users for the new academic year. Here are some of the highlights: The front page of the CAT website includes a “Back to Campus Toolkit” and updated “New (Attend Anywhere) Students” section, where you will find links to the [...]

2022-09-27T23:50:48-08:00September 27th, 2022|

POWERDOWN TESTING IS OVER!

As of 9/9/2022, after some significant breakthroughs during the night's work, the contractors and PGE were able to verify to their (and PSU’s) satisfaction that the new electrical control system is working as designed. Nightly power down testing is over. Unless some unforeseen problems crop up, we should be done with powerdown testing until our [...]

2022-09-09T05:26:07-08:00September 9th, 2022|

Linux Home Directory permissions change – 10am on 10/12/2021

We will be making a slight home directory permissions change for all users on our systems. The end result will lock down access to user home directories so that only the owner of the account can access the files. We expect this to only affect a very small minority of users who have specifically opened [...]

2021-10-11T19:16:40-08:00October 11th, 2021|

Dealing with SSH Host Key Changes

Dealing with SSH Host Key Changes The CAT periodically updates the SSH host keys on its servers for security purposes, which can result in users seeing an error message similar to below when attempting to connect with an MCECS Linux system. @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT [...]

2021-08-10T10:40:06-08:00August 10th, 2021|

Ruby and Rita SSH Keys changing – config changes will be needed

If you are a user of the following Linux systems, read on: linux.cecs.pdx.edu ruby.cecs.pdx.edu rita.cecs.pdx.edu At about noon on Monday, August 2nd, 2021, we will be changing the SSH keys on the Linux computers listed above. Anyone who has been logging into these systems on a regular basis will be greeted with a verbose “host [...]

2021-07-28T19:38:53-08:00July 28th, 2021|

Changes to SSH host keys

In an attempt to modernize our SSH infrastructure, we’ve made some changes to SSH keys on our Linux computers. We’ve disabled DSA host keys, and enabled new ECDSA and ED25519 host keys. This process took a few days, and during that time a few hosts had their keys changed. If you are experiencing problems trying [...]

2021-07-27T18:34:15-08:00July 27th, 2021|

Keep your guard up against Ransomware Attacks

As seen in recent headlines, institutionally targeted ransomware attacks are on the rise. The initial entry for these attackers seem to use many of the same techniques that we have seen in the past so it is becoming very important, as frequent computer users, to keep our guard up. This is particularly important for faculty, [...]

2021-06-07T18:53:30-08:00June 7th, 2021|

VNC in MCECS

Virtual Network Computing, or VNC, allows you to create a remote graphical session on another computer . You will be able to observe a remote Linux desktop environment and interact with it using the mouse and keyboard from your own computer. Using VNC is attractive to many Linux users because you can temporarily disconnect from [...]

2021-09-20T11:45:59-08:00December 22nd, 2020|
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