These articles are not complete but they should be able to assist with baselining the NAS with Linux:
Flash here:
http://linkstationwiki.net/index.php?title=The_LinkStation_firmware_flasher
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Start by creating the following
mkdir /mnt/hda/misc
mkdir /mnt/hda/opt
After that you should install the development tools. cd /mnt/hda/misc
wget http://downloads.linkstationwiki.net/development_tools/mipsel-tools-2_1.tgz
mkdir devtools
cd devtools
tar -xzvf ../mipsel-tools-2_1.tgz
./install.sh
Install expat
cd /mnt/hda/misc
wget http://switch.dl.sourceforge.net/sourceforge/expat/expat-1.95.8.tar.gz
tar -xzvf /mnt/hda/misc/expat-1.95.8.tar.gz
cd expat-1.95.8
./configure –prefix=/usr
make install
for more information please see www.linkstationwiki.com