It has been a while since the last time I did a whole system update in Slackware, this time I tried to install audacious, an audio player included in the official repos, the first thing to do was updating the list of files:

Then I installed audacious:

At certain point it seems that it asked me to replace configuration files. It messed with my whole system. Installing just an application messed with all my /etc directory. So my advice is that you always check the configuration files that will be updated no matter what you are doing or the distro you are using.

How I solved it?

The next day I realized that I had lots of .orig files in /etc. So I restore all my important config files.

Notice that I lost my /etc/rc.d/rc.local , there was not an /etc/rc.d/rc.local.orig