Why i have this output?

Question

If I write
###START###
import os
test = os.system("help") #or random things in the "
print(test)
###END###
the output is always "-1"?

Answer 1

I tried with existing command like cd or mkdir but it's -1

Answer 2

I think this for security reasons. If this function work, then it would be possible to execute any progrom on the sololern server. I think they hooked the function (and many others) to return -1 for any input parameter.

Answer 3

maybe