3. Building PCMCIA-SOURCE

First, be sure to download pcmcia-source, by typing
apt-get install pcmcia-source
This will download the source into
/usr/src
as
pcmcia-source.tar.gz

You now need to gunzip the file by
gunzip pcmcia-source.tar.gz
and then untar the file by
tar xvf pcmcia-source.tar

You should see pcmcia-source unpacked into the directory
/usr/src/modules/pcmcia-cs