Alternate OS image on an open board. This is not Android/Magisk root.
How-to
How to
Write the OpenWrt / Armbian / Arch Linux ARM / postmarketOS image for this exact board to microSD (or eMMC) and boot, per the source pages; open board, no bootloader unlock step.
Follow the specialist sources linked on this page. If this path is a jailbreak, unlock, or flash, the specialist wiki is the how-to — we do not copy those steps here.
Notes
Arch Linux ARM ODROID-HC2 platform page with install steps (archlinuxarm.org).
