Just get in the habit of checking for your keys before you go through any door. It takes no mental effort once it’s a habit. If they aren’t in your pocket (or in my case a lanyard) then they are in that room or vehicle, so you should recover them before going out. This method worked for me 100% for decades. It only failed after I got married and my wife started stealing them. But it’s usually not too hard to find her.

My neighbor at the trailer park was a janitor at the university. I built my computer from parts he salvaged from the recycle bin, and put Redhat 5 on it.

Presets for EasyEffects and PulseEffects.

On Debian, there is a package that displays system documentation including, if I remember correctly, man pages. I think I had to set up a local web server first.

On Archlinux at least, the glibc package includes info pages for C functions. Just type info libc at the command line, or use info inside emacs. There are hyperlinks in info pages, it’s a nicer interface than man pages.

PulseEffects can moderate the high-volumed sounds too. It has a complex set of controls and filters, and I’m not a sound engineer, so I just followed someone else’s recipe.

I don’t have any need to edit markdown, but I sometimes use Marker: “Simple yet robust Markdown editor made with GTK” as a viewer.