Recently I ran across an issue with reusing a Sony Minidisc that I have had for years and have always maintained on Windows due to the proprietary software. Being said it was never something I was able to get to work correctly until recently when I stumbled upon the Linux Minidisc Project at https://wiki.physik.fu-berlin.de/linux-minidisc/doku.php.
The project was started to get as much information on Sony NetMD/HiMD and making it work on Linux, Mac OS and BSD*. There is packages available for several Linux distributions as well as MacOS.
First add the ppa to your system
$ sudo apt-add-repository ppa:glaubitz/linux-minidisc
Update your repository
$ sudo apt-get update
Install the two packages available
$ sudo apt-get install python-netmd qhimdtransfer
If you have an HiMD device you are set and ready to start accessing your music on the player, but for me there is more to add. Since I have an older NetMD it will require gnetmd which can be found at http://pdr.cx/projects/gnetmd/main/ . Download gnetmd-0.6.
$ tar -xvf gnetmd_0.6.1.orig.tar.gz
$ sudo apt-get install libqt4-dev build-essential libglib2.0-dev libmad0-dev libmcrypt-dev libsox-dev git-core libtag1-dev
$ cd gnetmd-0.6.1/
$ sudo apt-get install libusb-dev libgnomeui-dev
$ sudo make install
Connect your netMD device and start copying music.