Linux
7 curated resources, easiest first.
Shows how to turn a USB stick into Ubuntu install media from a Windows PC using the free Rufus tool. The page notes it has been superseded by a newer guide, but the steps still explain the idea.
A walkthrough for installing Ubuntu Desktop 24.04 LTS from a USB stick. It covers writing the image, booting the installer, choosing a disk layout and creating your account.
Covers choosing a Mint edition, verifying the ISO, making bootable media, booting the live session and installing. It also has post-install tips on drivers and codecs plus troubleshooting for EFI, dual boot and partitioning.
Answers common questions about the Debian installer, including shrinking a Windows partition, collecting logs, rescue mode, RAID/LVM and preseeding. Good when an install misbehaves or needs something beyond the defaults.
The official installation manual for Debian 13 (trixie), available in HTML, PDF and text for six CPU architectures and many languages. It is the reference for preparing media, partitioning and installing.
Explains what firmware is and why most of it is non-free, and how Debian 12 and later includes it on install media. Covers what to do on older releases or when a device needs firmware Debian does not ship.
Explains each screen of the Debian installer, from boot menu and localisation to partitioning, accounts and the bootloader. Useful for understanding what each choice means before you make it.