turnkeylinux/confconsole — comment on commit bcf982f6a89dd915446150d6f73e0dfc7131746f
File: ifutil.py line 68
By smacedo:

must join options with \n
.post-up option, for example, to start iptables at boot will break both ifup and ifdown basic commands if one does not put the \n here
correct line:
ifconf += "\n".join([ "\n " + opt