Prepare your own emergency Debian bootable device for your LVM-over-LUKS Debian system.
Fast APT with tmpfs (with plenty DRAM) and Apt-Cacher NG@article
APT can be faster with a bit configurations.
Why GUI on Debian is slow on Intel PCs, and its solution@article
Debian GUI on modern Intel CPU PC tends to be slow. This article explains why and its solution.
Amounts of separated mountpoints (GNOME)@article
Quick and dirty, a tentative summary of statistics of the amounts of separated mountpoints. How much should they be? (UPDATED; Buster)