In my work computer I originally installed xubuntu 16.04 but started to blindly install stuff to change to dark background themes and I guess at some point I switched from xubuntu to elementary(about a year ago) and now I need to switch back to xubuntu without having to reinstall.
This is because with loki I can't upgrade to 18.04 or even install stuff like mysql-server that now I need for a project.
cat /etc/*-release
DISTRIB_ID="elementary"
DISTRIB_RELEASE=0.4.1
DISTRIB_CODENAME=loki
DISTRIB_DESCRIPTION="elementary OS 0.4.1 Loki"
NAME="elementary OS"
VERSION="0.4.1 Loki"
ID="elementary"
ID_LIKE=ubuntu
PRETTY_NAME="elementary OS 0.4.1 Loki"
VERSION_ID="0.4.1"
HOME_URL="http://elementary.io/"
SUPPORT_URL="http://elementary.io/support/"
BUG_REPORT_URL="https://github.com/elementary/"
VERSION_CODENAME=loki
UBUNTU_CODENAME=loki
cat: /etc/upstream-release: Is a directory