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Archive for the ‘UNIX System Administration’ Category

I support VNC at work for our students. In the past I supported it in our CONTRIB environment on Solaris, but now it’s installed as an RPM package in RHEL 6 Workstation on our new Linux login servers. I suppose it’s quasi-supported now perhaps. Our users have to access VNC servers using an SSH tunnel, [...]

Jan 16th, 2012 | Filed under Ruby, UNIX System Administration

I’m finally finishing my Gnome customizations for work. I’ve opened our new Red Hat Workstation 6 login servers to faculty, and I plan on going live with them next quarter in about a week and a half (or something like that anyway :-) A couple of faculty members asked me to add two launchers to [...]

Sep 12th, 2011 | Filed under UNIX System Administration

All of our Linux users do remote X11 queries to get a fully graphical user interface. We never seemed to have an issue with that until Red Enterprise Linux 5. I vaguely recalled some issue with slowness logging out of the Gnome desktop with RHEL 5. It only happened when logging out, and it caused [...]

Jun 7th, 2011 | Filed under UNIX System Administration

I am still working on our Linux migration. It has been a slow process due to various other projects I have to deal with. We were going to go with RHEL 5, but now that RHEL 6 is out, I decided to take the work done with RHEL 5 and go for the newer distribution. [...]

Apr 20th, 2011 | Filed under UNIX System Administration

Yeah, we still use NIS. I know, but it’s so easy! :-) I’ll move on to Kerberos for user authentication and NIS for user information (UIDs, GIDs, sans encrypted passwords of any sort, etc.) soon enough just about when I get rid of Solaris in our environment at work. It should have happened a while [...]

Dec 27th, 2010 | Filed under UNIX System Administration

It seems the NFS problem we were having is due to a bug in Celerra NAS codes 5.6.36 to 5.6.43 (fixed in 5.6.44). We upgraded to NAS code 5.6.40 before our EMC support ended. I found something in the EMC Knowledgebase about customers having performance issues under heavy CIFS load due to the CIFS trickle [...]

Dec 9th, 2010 | Filed under Hardware, UNIX System Administration

We had the same problem today as yesterday, though at a much smaller scale. The following error messages seem to happen when NFS goes out to lunch: I knew the word “cache” was in there somewhere. This combined with the recoverable single bit errors seems to be the problem so far. We failed over to [...]

Dec 2nd, 2010 | Filed under Hardware, UNIX System Administration

I really wanted to title this “Frame 527 hates Frame 526″ or something like that. These two Ethernet frames were perfect examples of an NFS problem we’ve seen in the last few weeks at work. We were having intermittent I/O errors, which usually resulted in a Bus Error in the process that was lucky enough [...]

Dec 1st, 2010 | Filed under Hardware, UNIX System Administration

I’ve decided to start using Git for revision control when editing configuration files on UNIX. Git is especially good for this since the repository is in the working directory. This avoids situations like the following: As you can see, my name is on the end of one of those files, so I can’t complain too [...]

Dec 30th, 2008 | Filed under UNIX System Administration