Boot a .iso directly using systemd-boot
Pretty self-explanatory.
I’m using systemd-boot, and my esp is /boot.
I want to run the official archlinux.iso directly from my /boot partition.
Steps:
mount archlinux.iso and copy "vmlinux-linuz" + "initramfs-linux.img" to a newly-created directory at /boot ( eg. /boot/live)
copy the archlinux.iso to /boot
create the /boot/loader/entries/live.conf entry with:
title Archlinux Live
linux /live/vmlinuz-linux
initrd /live/initramfs-linux.img
options img_dev=/dev/nvme0n1p1 img_loop=archlinux.iso copytoram(replace “nvme0n1p1” and “archlinux” above, accordingly)
This way, you can chroot into your system, at any given time, without the need of a bootable usb flash drive.