I Drivel http://blog.justinlintz.com whatever comes to mind Wed, 12 Oct 2011 01:37:13 +0000 http://backend.userland.com/rss092 en NRPE returning no output? command[check_recent_core]=PLUGINPATH/check_recent_core.sh --file="$ARG1" --freshness=$ARG2$

Spot the error? I only wasted an hour of my life and another 30 minutes of co-workers trying to figure out why I kept getting a "NRPE: No output returned from plugin" error in Nagios. The issue? $ARG1 is missing a closing “$”. *slams head on desk*

]]> http://blog.justinlintz.com/2011/10/nrpe-returning-no-output/ Useful C Debug Macro Tonight I took the plunge to get back into some more C coding. In getting my environment setup I came across a useful debugging macro. This macro will output the filename and line number every time it’s expanded. I wanted to make sure I understood how the macro was working before just copying and . . . → Read More: Useful C Debug Macro]]> http://blog.justinlintz.com/2011/09/useful-c-debug-macro/ My Stay Puft Marshmallow Man Moment A couple years ago I was sitting at a poker table for my final interview for a sys admin position with . It had been a long day of mentally exhausting questions, and the interview was coming to a close. The person I was interviewing with sat for a moment and pondered his next . . . → Read More: My Stay Puft Marshmallow Man Moment]]> http://blog.justinlintz.com/2011/04/my-stay-puft-marshmallow-man-moment/ Determining my most used focal length in photos with python and dcraw For the holidays I got a new Canon 7D camera. I’ve been saving quite a few amazon gift cards over the last year that I was previously planning on using towards purchasing the camera but thankfully Santa delivered me one. My current lens collection consists of

10-22mm f/3.5-4.5 70-200mm f/4 50mm f/1.8 18-55mm . . . → Read More: Determining my most used focal length in photos with python and dcraw]]> http://blog.justinlintz.com/2010/12/determining-my-most-used-focal-length-in-photos-with-python-and-dcraw/ Python pip on Ubuntu Lucid Lynx Lately I’ve been reading up on Django a bit in an effort to get back into programming.  It seems the preferred way of running Django is inside a virtualenv environment.  I try to stick to packages when possible for installing applications and saw that the python-virtualenv package wasn’t too far behind at version 1.4.5, . . . → Read More: Python pip on Ubuntu Lucid Lynx]]> http://blog.justinlintz.com/2010/09/python-pip-on-ubuntu-lucid-lynx/ Configuring Varnish At $WORK I’m currently working on deploying a pool of Varnish servers to sit in front of some Apache servers running Pressflow. On our current infrastructure we’ve been running Squid for the past few years with very good success , minus a hiccup or two along the way, one involving memory fragmentation (thank you . . . → Read More: Configuring Varnish]]> http://blog.justinlintz.com/2010/08/configuring-varnish/ Thinkpad Trackpoint sensitivity on Ubuntu A while back I found some notes on configuring the sensitivity of my trackpoint on my Thinkpad T43 and took the time to tweak the values to get it just right. The commands were

/bin/echo -n 171 > /sys/devices/platform/i8042/serio1/serio2/sensitivity /bin/echo -n 119 > /sys/devices/platform/i8042/serio1/serio2/speed

In order to keep those values the same on reboot, . . . → Read More: Thinkpad Trackpoint sensitivity on Ubuntu]]> http://blog.justinlintz.com/2010/06/thinkpad-trackpoint-sensitivity-on-ubuntu/ Check for missing reverse DNS entries on network A quick way to check your network for IPs missing reverse DNS entries….

nmap -PE -sP 10.0.0.0/24 | awk '{if ($2 ~ /^[[:digit:]]/ ) print $2}' ]]> http://blog.justinlintz.com/2010/05/check-for-missing-reverse-dns-entries-on-network/ Support for authorized-keys.d/ Why is there no subdir inside .ssh called authorized-keys.d where I can just throw my ssh keys and easily manage them by file name instead of having to edit the authorized-keys(2) file?

I need to do some googling on this , a quick search yields this debian bug report on wishing for support for . . . → Read More: Support for authorized-keys.d/]]> http://blog.justinlintz.com/2010/02/support-for-authorized-keys-d/ Python Quote module Over the past couple of years I’ve been wanting to learn Python more seriously but really haven’t sat down and just done it.   I’ve written a couple of various scripts for personal and work use but always felt they weren’t coded in a “pythonic” way.  I’m now reading Learning Python (4th edition) from the . . . → Read More: Python Quote module]]> http://blog.justinlintz.com/2010/01/python-quote-module/