2,278 reputation
1222
bio website karlkatzke.com
location College Station, TX
age 34
visits member for 5 years, 3 months
seen Mar 18 at 0:52

I'm a sysadmin for Sentry Data Systems. I do linux and clustering and networking, and enjoy instigating a good STONITH deathmatch when I get bored.

Work-wise, I'm a giant fan of the k.I.s.s. principle - keep I.T. simple, stupid. Don't make things any more complex than the features you need.

In my spare time, I renovate houses and ride herd on a pack of dogs with extreme mental issues. My background and career are both in systems. I look at systems, analyze them, and use them or make them better. I likeCFO DIY home stuff because the systems are simple and it's rewarding to figure em out and use them. How do I know the things I do? I have probably been there, broken that, ruined the other thing, and had to figure out how to fix all of them. we have this saying in my group of friends-who-renovate-houses: "Ask me how I know."


Jun
9
comment What is the Best Way to Monitor Server Temperature?
Oops. Sure did. Thanks, I've edited my response appropriately.
Jun
9
comment Key differences between Nagios and Open NMS?
To be pedantic, Nagios does data collection for things like uptimes, it just doesn't persist the specific performance data passed back from the client nor does it output performance data. There are options to persist this data inside a Round Robin Database (RRD) in the Nagios configuration, and then Cacti (or just plain ol' RRDTool) can be used to output the data.
Jun
9
comment How to manage Xen virtual machines on shared SAN storage?
I went ahead and updated things. Let me know if you need any more details.
Jun
9
comment Open source DNS server with database backend
PowerDNS worked great when I was working in a very active pre-packaged virtual hosting environment. We used BIND as a secondary server. There was a cron job that checked the two for replication errors.
Jun
8
comment NFS v4, HA Migration, and stale handles on clients
Allen, thanks -- that link did help. I've got a bunch of distro-specific stuff to debug now that I've followed the steps in that article, and I'll approve it if it ends up working.
Jun
8
comment Why does redhat seem to be so popular in the enterprise world?
Novell/SLES is gaining huge inroads. We're moving from a mishmash of BSD, Ubuntu, OpenSuSE and Redhat to SLES11 in a giant flock.
Jun
8
comment How to manage Xen virtual machines on shared SAN storage?
... I'm using Xen 3.3.1, YMMV with earlier versions.
Jun
8
comment How to manage Xen virtual machines on shared SAN storage?
Look in your xend-config.sxp file -- the config settings your looking for start at about line 261 on my system, and are called xend-domain-lock, xend-domain-lock-path, and if you want to set up an external utility to manage it in another way, you can specify an external command to run with xend-domain-lock-utility.
Jun
8
comment Password expiration policies
Actually, the vast majority of attacks in our workplace come from students breaking into offices in an attempt to access tests or to change grades. In previous (non-academic) positions, the vast majority of attacks came from social engineering.
Jun
8
comment Xen live motion
Also, I kept saying 'MULTIPASS!' in fifth element style while typing that quote.
Jun
7
comment What is the best resource for really understanding Linux deeply
Linux being free and easily repairable in most cases is definitely a resource. The experience of starting with a broken system and being able to see into all it's parts (Unlike a commercial OS) is a huge strength, and the only way you learn how to research a problem and feel your way through it is to do it.
Jun
6
comment How Often Should I Update our Linux Server?
We have a cron script that runs the equivalent for our SLES/OpenSuSE boxes nightly; when it finds that it needs packages, it submits a ticket to the system administration queue in our trouble ticket system. (It keeps track of which ones it's submitted before in a file in /tmp so that it doesn't spam the queue.)
Jun
6
comment What is preventing you from deploying desktop Linux in your environment?
Yeah, to clarify: the problem with deploying linux in our environment is the users, not the software. However, it is a real problem. I'm hoping things get better when current college students, many of whom are used to OSX, get up to management.
Jun
6
comment Network equipment console cables
What, firing the dunce? No, that always solves the problem. ;) We use permanent labeling, and group them by 'class' -- it would be rare that we only have one piece of a particular model. So we've generally got three or four cables of the same type. That way, if a cable breaks, we can use one from a 'close' model and be relatively certain that it will work. Pinouts can change with hardware revs. In the case of the bricked KVM, he used a serial cable from an APC smart power supply on a Belkin KVM. Caused a small release of magic smoke.
Jun
6
comment How do I set up a read-only file system mirror for an SVN repository?
... Why would making it a working copy chew up too much network drive space?
Jun
6
comment Extend Raid5 with a new HD (HP DL380 G3)
Sam, you won't see it unless you have a drive that the array can be expanded into. Sorry, I can't help you with the Windows side of things... I don't touch that stuff. Rots your brain and all that.
Jun
5
comment Should Cat6 cables be used for servers ('important hosts') rather than Cat5-E?
The internal plastic divider inside the Cat6 we buy is (a plastic + shaped thing) is a pain in the butt to work with.
Jun
5
comment Determine the free file space in Linux
du -h was always my favorite thing to say to a coworker.
Jun
5
comment Securing Webservers
The publicly distributed hash tables I know of go up to about 12 chars. Beyond that, well ... I have about 18 processor cores that run at up to 4 ghz in my spare room. If I were to start grinding out hash tables, how long would it take me to do 13 chars? Heck, my work desktop has 16 cores that run at > 2.5 ghz. If you are the type that's hacking people's accounts frequently, my guess is that you will have a script that will attempt a dictionary attack. Be1er0ph0r's PW is vulnerable to such an attack, regardless of length.
Jun
5
comment What kind of mail server do you use?
It's also the only major 'brand' server with a completely cross-platform client (looks/works the same in Linux, Mac, and Windows). It's now run on OES, which is basically SuSE Linux and the server post office is rock solid. It's gone from 'stupid' to 'odd, but rather nice after the extreme pain induced by Exchange.'