"echo "tmpfs DIR tmpfs rw,nosuid,nodev,noatime" | sudo tee -a /etc/fstab" Is this command correct? Shouldn't it be something like: "/tmp DIR tmpfs rw,nosuid,nodev,noatime"?

In your particular case it would be: tmpfs /tmp tmpfs rw,nosuid,nodev,noatime

The first value is a name since we aren't mounting a device, the source is implied to be ram because of the tmpfs filesystem.

OH I understand now, thanks!

I was expecting some crazy cowboy hacks but this was surprisingly useful. The author actually explains why he is doing things instead of just dropping some scripts on the reader.

Fedora:

sudo tuned-adm profile latency-performance

When DNF ask you to install tuned, say "y".

Thanks a lot for this!