TIL difference between /tmp and /var/tmp.

TIL what is Filesystem Hierarchy Standard (FHS).

TIL about PiJuice. It’s HAT for Raspberry Pi (not only Zero) which allows powering it on scedule to run some short periodic tasks.

Provides a full uninterrupted power supply solution for the Raspberry Pi Zero. These boards are compatible with any single-cell Lithium Polymer (LiPo) battery. The PiJuice Zero includes an integrated real-time clock and onboard intelligent on/off switch. These boards feature two programmable multi-colored RGB LEDs and are fully CE and FCC-tested. The PiJuice Zero comes with a full power management API for Raspberry Pi OS with auto shutdown capability when running low on batteries. These boards are also compatible with Raspberry Pi A+, B+, 2B, 3B, 3B+, 4B, Pi Zero, and Pi Zero W. The PiJuice Zero board is ideal for portable Pi, RasPi portable games console, point-and-shoot cameras, weather stations, and compact robots.