caub-on-fentanyl

-e CAUB On Fentanyl

This hard blocks updates by completely removing the updater from ChromeOS.

Requirements:

• chronos access or root access pref.
• pre-117 for sudo in crosh, or else you need to manually type the commands / cmd
• rootfs verification disabled

Instructions:

1. Open Crosh / VT2 (if post-117)
2. Run shell / login to chronos (if post-117 / VT2)
3. Run either the long command(s) (posted below) or the short command (posted below)
4. Reboot

LONG CMDS / MULTI-LINE: sudo stop update-engine sudo rm -rf /usr/sbin/update_engine sudo rm -rf /usr/bin/update_engine_client sudo rm -rf /sbin/chromeos-firmwareupdate sudo rm -rf /opt/google/cr50/firmware/* #this does not nuke your device. it removes the staged cr50 updates, preventing them from being flashed sudo sed -i “/etc/lsb-release” -e “s/google.com/gooole.com/g”

SHORT CMD / 1 LINE: sudo stop update-engine && sudo rm -rf /usr/sbin/update_engine && sudo rm -rf /usr/bin/update_engine_client && sudo rm -rf /sbin/chromeos-firmwareupdate && sudo rm -rf /opt/google/cr50/firmware/* && sudo sed -i “/etc/lsb-rel” -e “s/google.com/gooole.com/g”

Extra information: You can zero ROOT-B if you really want to make sure you don’t update. To do this, run these commands: (This could nuke your root partition, please be careful when running these commands!)

root_dev=$(rootdev) cleaned_dev=”${root_dev//p[0-9]*/}” sudo dd of=$(cleaned_dev)p4 if=/dev/zero bs=1M status=progress sudo dd of=$(cleaned_dev)p5 if=/dev/zero bs=1M status=progress

Credits: katelyn | Titanium Network