Nice Sed tutorial

http://www.grymoire.com/Unix/Sed.html

Back from Allahabad

Just back from the Village, tired and weary. Slept a lot and still I feel sleepy. will update the awesome pics in some time :)

mac ports upgrade error 'Problem while installing dcraw'

refer to discussion here http://trac.macports.org/ticket/23594

do this
sudo port deactivate ufraw
sudo port upgrade outdated

resolved my issue.