sudo wget http://mirror.pnl.gov/ubuntu//pool/universe/p/ppa-purge/ppa-purge_0.2.8+bzr56_all.deb; dpkg -i
                ppa-purge*.deb
--2012-10-02 22:37:25--  http://mirror.pnl.gov/ubuntu//pool/universe/p/ppa-purge/ppa-purge_0.2.8+bzr56_all.deb
Resolving mirror.pnl.gov (mirror.pnl.gov)... 192.101.102.2
Connecting to mirror.pnl.gov (mirror.pnl.gov)|192.101.102.2|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 4360 (4.3K) [application/x-debian-package]
Saving to: `ppa-purge_0.2.8+bzr56_all.deb'

100%[============================================================================================>] 4,360       --.-K/s   in 0.1s

2012-10-02 22:37:26 (41.9 KB/s) - `ppa-purge_0.2.8+bzr56_all.deb' saved [4360/4360]

dpkg: error: requested operation requires superuser privilege
$ sh: 39: ppa-purge_0.2.8+bzr56_all.deb: not found