Thanks. I've used apt-get a reasonable amount, but mostly as a recipe following instructions. What I mean is understanding what's going on behind the scenes, what changes will result and so on. With Windows, if I install something, I can make a fair guess what directories will change, what else will also be affected, and so on. With Linux, I'm hazier. I understand mount points and the basic tree, but I haven't really learnt the distinct purposes of most folders in the tree such as /bin
There are a couple of package managers on my system that I can also use, I think.