How to access port programmes (such as chkrootkit or clamav)

[pensevicke@…]

I have macports installed on El Capitan but port and sudo port commands to try to activate a macports installed programme only produces an error such as: Error: Unrecognized action "port clam" Error: org.macports.load for port clamav returned: Launchd plist /Library/LaunchDaemons/org.macports.clamav.plist was not found So I don't know how to use macports programmes. Sudo port self-update works and other port commands but I can't access anything in it, any of the programmes that macport has installed to run and use them. I've looked long and hard for answers on the net but can't find anything.