BTRFS

I do not understand BTRFS.

Here are some things I have learned:

sudo btrfs balance start /

is a bad idea.

You probably want something like:

sudo btrfs balance start -musage=50 -dusage=50 /               

People say don't believe `df` or other free-space tools. They're right, but if you've just run the above balance command... it's probably close enough.

What else... bees. It's freed up a bit of space on my disk, but it also made my processor fan rev up something crazy. I wouldn't bother with it.