This wiki is really my digital notebook of things I found useful and weren't one google/stackoverflow/chatgpt search away.

You can reach me on twitter or via email at my idea of a spam-proof address here:

echo "jp.is.king" | perl -ne "s/\./@/g; print" | perl -ne "s/is\@king/bitsilla/g; print" | perl -ne "s/$/.com/; print"

Below find some common tasks I keep returning to or are of general interest (or scarce on the www).

• How do I create a python environment for study unit XXX1234?
• How do I export an Anaconda environment to a file (for distribution)?

• How do I install cassandra?
• How do I fix Cassandra after an Ubuntu upgrade?

• How do I change the MOTD banner?
• How do I run tasks in parallel using GNU parallel (e.g. compress files of a certain kind)?
• How do I split a file based on the first column (e.g. of a csv file)?
• How do I insert the same header in all files?

• How do I create a tag from a branch (and remove the branch) ?

• How do I run JupyterHub on Titan ?

• How do I install Molgenis on Ubuntu ?

• How do I install PyMOL on windows ?
• How do I select all residues within n distance from an object ?

• How do I copy a "shared with me" directory locally ?

This is perhaps the most annoying piece of software I have ever managed. Questions on the mailing list either go unanswered or else are replied with “it is easier to just reinstall your cluster”. I mean, seriously guys. I am writing these notes down as I am sure I will need to refer to them later.

• How do I reinstall a compute node from scratch?
• How do I add an interface (e.g. public) to a compute node?
• How do I add a user to the Rocks cluster?
• How do I distribute a file across all the nodes in the cluster?
• How do I change Rocks cluster private domain name?
• How do I install an RPM across all compute nodes (on kickstart)?
• How do I create an RPM package from an existing directory (how to package a program)?
• How do I FTP a file from head to compute nodes on installation?
• How do I configure the second ethernet card on compute nodes so that the rest of the intranet (and internet) is available to compute nodes?

• How do I install UM's VPN on Arch Linux?

• How do I install and run Lubuntu in a Virtual Machine?

• How do I reset a theme in Wordpress (like fresh install)?