Posts tagged 'how to'

Edit, July 2015:

A mere two weeks after I posted this, pip version 7 was released and changed things again. If you have the wheel library and pip version 7 or above, wheel building and caching is now switched on and run by default, you just need to pip install …

Show me the code already! (Link to online IPython Notebook.)

Recently I've been working on a project involving a bit of decision theory, which I hope to get finished up and published soon. In the process of figuring out how to calculate exactly what I need, I've also been exploring …

Update 2015: This post is a bit out-of-date, now. See the more recent post on using the Wheel format to cache package builds.

After you've been coding in Python for a while, and you've been bitten by a few package-version incompatibility bugs, it gets to the stage where the first …

This weekend, I finally got around to spending a little time cleaning up a single-file script I wrote to automatically process files as they are transferred into a local directory, via rsync.

The fact that I was able to do this in a short script is largely thanks to pyinotify …

One of the fallbacks / features (depending on your preference) of using XFCE over the standard Ubuntu interface is that you don't get per-session ssh-agent handling (via a graphical interface) out-of-the-box, meaning you must manually fire up ssh-agent every time you login on your desktop. A minor annoyance, granted, but I …

Or, everything you wanted to know about setting up Ganglia, but couldn't grok from the official documentation - part 2.

In this post I'll cover:

• What purposes the different Ganglia utilities serve, and how they fit together.
• How to set up a minimal configuration, from apt-get install through to configuring Apache …

Or, everything you wanted to know about setting up Ganglia, but couldn't grok from the official documentation - part 1.

I recently set up Ganglia monitoring on couple of new machines I'm looking after. While I've used Ganglia before, I wanted to do some slightly non-standard things this time around. This …

There seems to be very little information on the web about setting up disk quotas, presumably because it's perceived as being trivial. However, it's nice to have this confirmed or refuted before you dive in, so here are my notes.

First off:

$ sudo apt-get install quota quotatool

Now edit /etc …

For cluster-usage monitoring I've mostly been using Ganglia, as covered here. But while it provides a great overview, sometimes you need to drill down and quickly see who's running what, on which node.

For this, htop is a great tool with minimal overheads - console friendly interface, tiny footprint etc.

I've …

Just testing a shiny new Dell Precision M4700, which is great... except the trackpad isn't recognized in Xubuntu 12.04, resulting in no multi-touch - it's amazing how clunky resorting to scroll bars seems now. Anyway, it turns out Dell are not thoroughly supporting the 'Alps' trackpads used on their latest …