Ce que tu cherches, c’est le paquet kdf:
$ apt-cache search kdiskfree
gtkdiskfree - A program to show free/used space on filesystems
kdf - disk space utility for KDE
$ apt-cache show kdf
KDiskFree displays the available file devices (hard drive partitions, floppy
and CD drives, etc.) along with information on their capacity, free space, type
and mount point. It also allows you to mount and unmount drives and view them
in a file manager.
This package is part of KDE, as a component of the KDE utilities module.
See the 'kde' and 'kdeutils' packages for more information.