Archive for the ‘tips’ Category

Apache UserDir cgi-bin configuration

I use blosxom as a simple blog at work. I have two bash functions that allow me to use the blog as a timelog. Whenever I change workstations, my blog breaks for a while until I get around to relearning how to setup cgi for user directory’s. This time, I’m writing it down! 🙂 First, […]

SSL on Glassfishv2

We bought a real SSL cert for our OpenSSO server.  That means I need to “install it” on the Glassfishv2 installation that runs the OpenSSO app.  The new cert came with three other certs, that I now understand are the “chain” that legitimize our cert by associating it (somehow) with the external authority. After much […]

Faster grepping with awk.

Turns out that for some cases, awking is much, much faster than grep. Just now, I wanted to know how many unique MAC addresses appeared in our DHCP server’s log file asking for a lease but not getting it.  There are a few ways to skin this cat.  What’s interesting is that some ways are […]

Treason uncloaked

Plagued by these messages in your Linux server’s kernel log – kern.log? Finally tracked down a reasonable explanation this morning. Seems a bug was introduced in the kernel back in 2.6.8 and it causes, among other troubles, this error message: Jan 17 12:30:13 iml kernel: TCP: Treason uncloaked! Peer 134.48.120.88:3832/80 shrinks window 3881756777:3881761622. Repaired.Jan 21 […]

Why do I get ‘host not found’ errors? Well…

A friend asked me today if I know about DNS Servers. “Yeah, I do. Can I help with something” I wrote back? She wrote this: For example, in my browser I can type in www.espn.com and when the DNS server does not work, an error message states that the web site could not be found. […]