scripting against windows

So, I've been running UNIX and Linux for a long time. I've also run Windows for a long time. I do have a preference and one of my chief issue with Windows (and the reason I feel it's tedious) is that it is difficult to script against. That is not really a problem when you are running a handful of servers, but when the number goes to dozens, clicking simply doesn't cut it for me.

quick to sleep, but slow to wake (resume)

So I finally took the plunge and upgraded to Hardy Heron and am generally pleased. The one thing I noticed which I did not care for was the behaviour of suspend and resume. It worked great under Gutsy Gibbon but after my upgrade it was slow to return from suspend.

The laptop went to sleep in about the same amount of time, but when resuming, it would sit at a black screen with a single underscore in the top left corner for about a minute before going back to X.

device mapper, logical volumes, mount points and raw device paths

The other day I was needing to dig into I/O performance on a Linux box and in the past iostat has served me well, so I tried the good old

iostat -x

but wasn't quite sure what to look at.

Now the box I was working on was enjoying the benefits of RAID and LVM and so the output I saw looked as follows:

avg-cpu: %user %nice %system %iowait %steal %idle
0.01 0.00 0.01 0.00 0.00 99.98

howto move mbox files to an IMAP server

So I found myself in a conversation the other day about some things from a previous life. I knew I had some details about it somewhere in old email archives and started grepping for it. I found a lot of stuff but not the right stuff. Since it wasn't critical, I left it sit, but thought that it sure would be nice to have all of my old email on my mail server, where I can then use the search functionality of my email client. That's where it got to be interesting ...

OSX envy and how to get per domain DNS servers

I work with a few people who are staunch Mac OS X lovers. I admit it's neat, but for me, there isn't anything there I need, that isn't already satisfied by my Ubuntu box. Then I found out about a feature in Mac OS X, that allowed for the definition of per-domain DNS servers. So for most of the DNS the general default/public/dhcp provided DNS server was great, but for servers and such on the other side of the company VPN I had to kludge around it. Then I figured out how to do the same thing on my laptop.

The setup is really rather simple:

Vista Home Premium without that premium feeling

So there is a Vista box near me now. I could lament how 1GB of RAM doesn't go as far as it used to , but really I can live with. Something else about Vista really gnawed at me. When I said the Vista box is near me, I meant that it is near enough that I can easily get to it. That of course doesn't mean I want to stroll and wander, hike and travel to it, when I need to use it.

On XP i enjoyed remote desktop and performed most of the windows things remotely. Lucky for me, none of the Vista Home editions including Premium allow you to remote desktop to the host.

Computer Science Education

It seems like a very long time ago since my days as a computer science student. I came to the game late and was fortunate to have found some great teachers and mentors at a small institution in the Minnesota.

During my studies there was a very pervasive thread of gaining understanding. I took machine architecture classes, which forced me to understand how the data is shuffled around in its most basic form. I studied algorithms and data structures and gained much insight in how to do and not do things.

mod_authnz_ldap for Apache and the mystery of the missing REMOTE_USER

New changes in the Apache 2.2's authentication have made some things a with respect to LDAP integration a little different.

For example, the new module that handles ldap authentication is called mod_authnz_ldap. This is a little unique in terms of the other authentication and authorization plugins, with separate the these two aspects. mod_authnz_ldap combines the 'n' and 'z' parts.


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