The article BootProcessSpeedup on the Debian Wiki lists a tip to speed up boot time. It says to install readahead and then
It seems like an outdated article, because when I try this, it gives an error saying there's no such file or directory (it's referring to readahead). I browsed to /etc/ and noticed that there is a folder called readahead.d, not readahead. What do I need to do? modify the command to include ".d"? Or not do anything at all?