How can I clean up my MacPorts installation?
Solution 1:
The suggestions you received cover what you're after:
sudo port -f clean --all all
sudo port -f uninstall inactive
If you can't wait for the clean one to run in the background, there are a few commands you can run manually and faster.
Remove leftover build files (this is done automatically by default):
sudo rm -rf /opt/local/var/macports/build/*
Remove download files:
sudo rm -rf /opt/local/var/macports/distfiles/*
Remove archives (these aren't created by default):
sudo rm -rf /opt/local/var/macports/packages/*
Solution 2:
port uninstall inactive
is the way to go.