Is it possible to do a Factory Reset from an SSH or FTP session ? Every time that I try and go into system settings, my Odroid just reboots - sometimes immediately and sometime after trying to go into some of the menus in there.
I changed the skin back to estuary but it consistently crashed trying to get into the System Settings so my only avenue is via an SSH or FTP. I haven't a clue as to what I have done with my eMMC adapter, so a re-install is not an option at present 
For a reset via SSH, you can do the following commands:
rm -rf .config .cache .kodi
rebootI think creating file /storage/.cache/reset_oe or /storage/.cache/reset_xbmc forces to make a reset on next boot.
Finally more than 1 year later, whats the official ssh command to hard reset a libreelec device?
yeah, linux rocks 
Yes, I only think according to this: force factory-reset with SSH
But you can try and report back the result 
Necromancy, but here's updated info:
Create /storage/.cache/reset_hard or /storage/.cache/reset_soft so, just touch it and reboot)
And the actual script that does the reset is here: https://github.com/LibreELEC/Libr…actory-reset#L4
Soft reset only clears the config https://github.com/LibreELEC/Libr…ctory-reset#L76, while hard reset just wipes out all user storage https://github.com/LibreELEC/Libr…y-reset#L53-L61