port install watch

watch is one of those GNU tools that I can hardly live without.
watch -d 'df'
Is an example. Let's get this installed on the MBP, (Snow Leopard).
sudo port install watch -d
Password:
---> Computing dependencies for watch
---> Fetching watch
---> Verifying checksum(s) for watch
---> Extracting watch
---> Configuring watch
---> Building watch
---> Staging watch into destroot
---> Installing watch @3.2.8_0
---> Activating watch @3.2.8_0
---> Cleaning watch