Uninstalling apps is a nightmare. For instance, I use 'sudo apt-get install nginx' and then when I go into Software Center, and uninstall it... it still keeps all the configs and some folders and I'm curious why.
I try using -rm -r on the folder ... it removes it all, success! Though, not for long. If I was to reinstall the application, it creates all the folders it needs ... but NONE of the files. So in order to reinstall an app, I need to reinstall the OS.
If I uninstall it, but not remove the excess files ... I can reinstall fine. It's just a hard wipe that doesn't reinstall fine.
The app could be nginx, it could even be PHP or many other things. What is happening and how can I fix this?
I did actually attempt purge, it didn't remove the configurations so I tried it again and it mentioned there were two apps that were related and if I was to install. I was to do 'autoremove'. It's not necessarily an instant reinstall. I perhaps may want to completely remove an app and then install it again in a few months later.
Just can't figure it out, but I guess I can have an attempt to read the manpage and see if it makes sense to my little brain, so right now I'm going to have to reformat in order to be able to install nginx again to test.