I have 20GB for my Mint-KDE 18 root partition. There is no extra home partition. I am doing nothing special, just Chrome, KRDC, Teamviewer and the partition was half empty. One thing I did was copying in Dolphin from webdavs repo on the internet to my network drive via samba. Nothing was stored on my PC.
Now I got the message that my disk is full. When I open my root or home directory in Dolphin it says 0 MB free.
What is the fastest way via terminal to view my directories and files, biggest first or newest etc?