as root
cd /usr/src
gunzip pchar-1.4.tar.gz
tar xf pchar-1.4.tar
rm pchar-1.4.tar
cd pchar-1.4
./configure
make
make install
make clean
Have to be root to run it. Not sure if it works: it seems you say, like, "pchar mit.edu" and then wait a *long* time.