Epoch Time

Have you ever needed a way to determine UNIX (Epoch) Time, or perhaps its
counterpart in 24 hour format?

via perl:

        server [0] perl -e 'print scalar time;' ; echo
        1154020678

        To use UNIX time to determine it's correlative in 24 hour format:
            server [0] perl -e 'print scalar localtime 1154020678 ;' ; echo
            Thu Jul 27 13:17:58 2006

via gnu awk:
        server [0] gawk 'BEGIN{print systime()}'
        1154020897

        To use UNIX time to determine it's correlative in 24 hour format:
            server [0] awk 'BEGIN{print strftime("%d %b %Y,  %H:%M:%S", '1154020897')}'
            27 Jul 2006,  13:21:37

via gnu date or /bin/date on FreeBSD:
        bsdhost [0] date +%s
        1154021261

        To use UNIX time to determine it's correlative in 24 hour format:
            bsdhost [0] date -r 1154021261
            Thu Jul 27 13:27:41 EDT 2006

Update:  I've posted a utility, timetrans.pl, that specifically handles time
    translations between epoch time and normalized date/time formats.
    The utility accepts either TIME as a parameter or as piped input and
    allows for input modifiers to further adjust the resulting time output.
    Have a look at the link above for examples.
  -- troy (04/2012)