Make a directory to house your shortened URLs.
$ ssh example.com mkdir public_html/u
On demand, create a subdirectory for the shortened URL you want to create.
$ ssh example.com mkdir public_html/u/hpr
Create an HTTP redirect in an index.html file.
$ ssh example.com echo ""<html><title>Shortened URL</title><head><meta http-equiv='refresh' content='0; URL=http://hackerpublicradio.org/correspondents.php?hostid=78' /></head></html>"" > www/u/hpr/index.html
Your shortened URL is example.com/u/hpr