laga@prometheus:~/dev/python$ python debconf1.py
Traceback (most recent call last):
  File "debconf1.py", line 2, in <module>
    execv('/bin/true')
NameError: name 'execv' is not defined
laga@prometheus:~/dev/python$ cat debconf1.py
import os
execv('/bin/true')
laga@prometheus:~/dev/python$