All Computings
unit files
https://www.digitalocean.com/community/tutorials/systemd-essentials-working-with-services-units-and-the-journal https://www.freedesktop.org/software/systemd/man/systemd.unit.html Units are the fundamental files of systemd, representing everything from services to targets to Devices They are used to define most aspects of the system that systemd can control
Unicode
Standards for the representation of text Examples UTF-8 UTF-16
UEFI
https://uefi.org/specifications A boot firmware, on an IBM-Compatible system, loaded from a motherboard’s ROM chip ( CMOS), to initialise the CPU, basic hardware, and loading the operating system Establishes system tables pointing to other important tables such as ACPI Largely supersedes BIOS, but most platforms will still support both in some fashion Is basically a mini operating-system - putting the processor into either 32-bit or 64-bit (vs the BIOS will usually only initialise into 16-bit), and even has basic File System access Looks for a Bootloader by using its file system code to find a specific file, rather than looking for a magic binary blob at the start of the disk Platform Initialisation See: https://github....
udev
https://wiki.debian.org/udev A System Daemon that receives ongoing information from the kernel about various device events, and can take actions...
Tracing GC
A Garbage Collection strategy to trace which objects (ares of memory) are still reachable from certain other objects. If an object is no longer considered accessible, it is “collected” (freed)...
tmpfs
A Pseudo File System to store temporary files created by processors Maps to memory, instead of being stored on a disk and is ephemeral
Threading
POSIX Threads run inside a Process and share its Memory and Address Space
Terminal Emulator
A terminal-like interface that allows an end-user to interactively work with a host operating system. See also: Shell
targets
https://documentation.suse.com/smart/linux/html/reference-managing-systemd-targets-systemctl/index.html https://www.freedesktop.org/software/systemd/man/systemd.target.html# Targets represent various operational states for a system (replacing runlevels). Although there are common states that are corollaries to the old runlevels, targets can be customised to put your system in a variety of different configurations...