NCDU

NCDU (NCurses Disk Usage) is a disk utility for UNIX systems and disk usage analyzer with an ncurses interface. It is designed to find space hogs on a remote server where the user don't have an entire graphical setup available, but it is a useful tool even on regular desktop systems. Ncdu aims to be fast, simple and easy to use, and should be able to run in any minimal POSIX-like environment with ncurses installed.