Nagios looks at 1) return codes and 2) output to stdout. This is the hello world of Nagios plugins, written in Python: check_helloworld.py: #!/usr/bin/env python # optparse is Python 2.3 – 2.6, deprecated in 2.7 # For 2.7+ use …
In terminal you can write something like: say ‘hello world’ Which will make your computer talk. To save the audio output to a file, use the -o option. A full example is: say -o hello.aiff -v ‘Alex’ ‘Hello, my name…
My top seems to act a little strange (running Snow Leopard). It doesn’t respond to the key commands I’m used to, e.g. for sorting on Memory Usage etc. Nevertheless, this is how I found out (by chance really) how to…
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…
Here’s a game I like to play. Select two wikipedia pages at random, and find a route from one to the other. I stated a theorem once that: you can get from any page on wikipedia to the page on…
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…
Google Fusion Tables is a service for storing tabular data online. It has an API that allows you to make an SQL-like request for data from an online table, like the following: sql=SELECT * FROM 1906375 (clicking the link will…
Introduction to CORS CORS (Cross Origin Resource Sharing) is a mechanism specifies by W3C (draft), for allowing browsers to make cross origin requests for resources on other domains under certain conditions. It’s related to JSONP because it solves a similar…
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