Say my log file(log.txt) is something like2014-01-01 22:30:30 something happened....2014-01-01 22:30:31 something happened....2014-01-01 22:30:41 something happened....I want to tail this file to show last hour's log, and keep tailing..i.e.tail <some magic to specify last 1 hour> -f log.txtThen the output is 2014-01-01 21:30:41 something happened.......2014-01-01 22:30:30 something happened....2014-01-01 22:30:31 something happened....2014-01-01 22:30:41 something happened....Is there a tool to do this? 
How to tail a log file by time?
linux;bash;shell script;command line;tail