Hi Patrice, Thanks for your bug report. I will an optional sequence, like apt-cacher-ng, to solve this issue. I tested it using the piuparts command.
deluser --system mrtg 2>/dev/null || userdel -fr mrtg 2>/dev/null delgroup --system mrtg 2>/dev/null || groupdel -f mrtg 2>/dev/null Regards, Eriberto
