These instructions show how to install pip and virtualevn on a Mac running Snow Leopard 10.6.8 and using Python 2.7. I used this to install Django 1.3.1 (installation instructions included). Installing pip (skip if you have pip installed) First make…
This howto shows how to get Nagios up and running on an Amazon EC2 Instance using Apache web server to serve the Nagios UI. You could argue that a more light-weight web server would be better, but I’d argue that…
Place each word on a separate line with sed and awk: sed -e ‘s/[^[:alpha:]]/ /g’ | awk ‘{ for (i=1;i
I read somewhere that if you take a list of words reverse the letters in each word sort the (reversed) words alphabetically then reverse the words back to normal
In this example I had a big log file (many million lines), that I wanted to split into smaller logfiles (each one million lines) for processing on Elastic MapReduce. -rw-r–r– 1 kostas staff 543067012012 Oct 11 13:45 huge_logfile This is…
There is a good little tool called s3funnel on GitHub for this. I used easy_install to install on my Mac. easy_install s3funnel
One way to check whether a library is installed is to use ld, e.g. check that zlib is installed: ld -lzlib If library is installed you’ll get something like this: ld: warning: -arch not specified ld: could not find entry…
The trick is to use vmstat and look at the number for “wait on acknowledge”. vmstat -S m 1 100 Look under “cpu” and the “wa” column. If this number is high, it is bad. It should be zero. Some…
Warning: This is a description of how to create a OpenStreetMap WMS with GeoServer. It works fine up to the point where the layers published as an unstyled WMS. This is where I’ve not been able to produce a good…
If you have an ESRI Shapefile (.shp) that you want to reproject, you can use ogr2ogr ogr2ogr -t_srs newfile.shp oldfile.shp The EPSG code could be for instance epsg:28532.