Yesterday my package manager insisted in updating Bash to version 4, which was released some time ago. I was a bit worried because as this new version intruduced new features, just in casethey could cause some of my working scripts to fail miserably. The fact is that finally I decided to bump to the new version, as I have not heard nothing about painful upgrades (as happened in the 2-to-3 transition). After installing it everything continues to work nicely with version 4.0… and I can try out the new cool features (hash tables are one of my favourites!).