Slingring

I'm pretty sure I corrupted my installation of OPENOS, how do i wipe my disk drive and reinstall it?
I tried "del OpenOS" since it was listed on df but it says "no such file/directory exists"

So i went to google and tried to get the full commands list, and apparently "RM" wasn't listed in /bin???
so I removed some directories, but then the system forced itself into "read-only" mode and prompted me to install again

attached screenshot is my current directory when "df" command is used