Category Archives: SLES

RSA Web Agent Installation: what might go wrong

Intro As usual I ran into a few problems installing the RSA Web agent for a client. With this documentation I hope to jog my memory for my next installation or help someone else out who is experiencing the same … Continue reading

Posted in Admin, Apache, Security, SLES, Web Site Technologies | Tagged | 3 Comments

The IT Detecive Agency: emails began piling up this week, no obvious cause

Intro Today I had my choice of problems I could highlight, but I like this one the best. Our mail server delivers email to a wide variety of recipients. All was going well and it ran pretty much unattended until … Continue reading

Posted in Admin, Internet Mail, SLES | Tagged , , | 1 Comment

Strange problem with email to paladinny.com

Intro This is probably the most obscure of all postings I will ever do – it’s really just opening up my private journal to the Internet, which helps me when I need to recall how I fixed something. So the … Continue reading

Posted in Admin, DNS, Internet Mail, SLES | Tagged | 1 Comment

Ethernet Bridging on the cheap. Fail. Then Success with OLTV

Intro Some experiments just don’t work out. I became curious about a technology that has various names: ethernet bridging, wide-area VLANs, OTV, L2TP, etc. It looked like it could be done on the cheap, but that didn’t pan out for … Continue reading

Posted in Linux, Network Technologies, SLES, TCP/IP | Tagged , , , , , | Leave a comment

The IT Detective Agency: ntp server shows the wrong time after patching

Intro One of my ntp servers hadn’t been patched in awhile so it was time. Other systems rely on it for time synchronization. The next morning after the patching I noticed that the ntp service wasn’t even running. I started … Continue reading

Posted in Admin, Linux, ntp, SLES | Leave a comment

The IT Detective Agency: A couple of our SLES servers are running very slowly

Intro Sometimes truth is stranger than fiction, even in the IT realm. I actually had a mere supporting role in this case – credit must be given to my persistent and accomplished friends for finding the root cause. This Unlikely … Continue reading

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How to Get By Without unix2dos in SLES

Intro As a Unix old-timer looking at the latest releases, I only have observed one tendency – that of ever-increasing numbers of commands, always additive – until now. A command I considered useful (well, basically any command I have ever … Continue reading

Posted in Admin, Linux, SLES | Tagged , | 2 Comments

Building sendmail on SLES

Intro My sendmail binary built for SLES 10 SP 3 was not working well at all on SLES 11 SP1. It became apparent that libraries were not compatible so it was time to re-compile. I’ve documented that journey here. There … Continue reading

Posted in Admin, Internet Mail, Linux, SLES | Tagged , | Leave a comment

The IT Detective Agency: Cognos stopped working

Intro Here’s another in our continuing exciting IT drama. A user reports that her Cognos app stopped working. She’s in charge of the Cognos application servers, I run the Cognos gateway on a Linux server. I have almost no working … Continue reading

Posted in Admin, IT Operational Excellence, Linux, SLES | Tagged , | 1 Comment

The IT Detective Agency: the case of the messages from mars

Intro Today we got a “funny” message on our SLES 11 server in the /var/log/warn file. You might think that Martians have landed! The Details Specifically this: Nov 9 10:54:19 drjohn24 kernel: [72397.088297] martian source 10.120.2.24 from 10.0.0.3, on dev … Continue reading

Posted in Admin, IT Operational Excellence, Linux, SLES | Tagged , , | Leave a comment