This category contains little odds and ends that I find myself needing to know reasonably regularly but not often enough for me to actually remember them. Probably by recording them here then I've done enough to fix them in my memory so these entries don't need to actually exist, they just need to have existed. Thus by existing they remove the need for their existence. How sad. Stuff in this category hasn't really taken any great work to find; most of it is excerpts from manuals or just a note that a particular command is the right one to use.