How to install Scala and sbt to Ubuntu 12.04 LTS

Scala is a really nice JVM based programming language. This post explains how to install it to Ubuntu 12.04 LTS system. If you don’t just play with Scala console but want to start a project, then you need Simple Build Tool (sbt) installed as well.

Treating files as sets: comm utility

Sometimes during administration work with real system you can have a simple task: get list of strings and find subset of this list missing in other list. Seems to be trivial but if you have thousands of values, then it’s time to use some automated solution.