Maybe someone can help me.

I usually use the apt-file tool to know from which package a file comes
from. This works for me on Debian, but on Devuan apt-files tells me this:

root@devuan:~# apt-file update
Ignoring source without Contents File:
http://br.mirror.devuan.org/merged/dists/jessie/main/Contents-amd64.gz
Ignoring source without Contents File:
http://security.debian.org/dists/jessie/updates/main/Contents-amd64.gz
Ignoring source without Contents File:

http://br.mirror.devuan.org/merged/dists/jessie-updates/main/Contents-amd64.gz
root@devuan:~# apt-file search mysql_secure_installation
E: The cache is empty. You need to run 'apt-file update' first.

I'm behind a HTTP proxy but apt-get it's working ok.

Thanks in advance,
Emiliano.