Script to fetch and download the latest version of the Chrome OS Flex image

crosflex_downloader.sh

#!/bin/bash

URLs=$(curl "https://dl.google.com/dl/edgedl/chromeos/recovery/cloudready_recovery2.json" \
-s --output - | \
grep "^.*\"url\".*$" | \
sed "s/.*\"url\": \"\(.*\)\".*$/\1/g")

printf "\nPick which channel to download your image from. Channel name is near the end of the URL.\n\n"

select URL in $URLs;
 do
	if [[ $URL != "" ]]; then
 		printf "\nDownloading now...\n\n"
 		curl -L -C - -O $URL && break
	else
		printf "\nInvalid selection, please pick one of the above displayed numbers.\n\n"	
	fi
done

printf "\nFinished downloading!\n"

Info below about 3 versions available in 2025. (was translated from a russian zeroday website.. hard to find this info elsewhere ;-)

• S (Stable, stable) — devices are automatically updated to the next stable version every month. Newer than LTC which is newer than LTS.

• LTC (Long-term support candidate, long-term support candidate) — devices receive LTS functions 3 months before the release of the version on LTS. Devices are automatically updated to the next version of LTC. May have same or newer version of chromeos and chrome as LTS.

• LTS (aka LTR) (Long-term support, long-term support) — devices are automatically updated to the next version of LTS every 6 months.