Pick the last one hour lines from log matching this pattern.

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# 15  
Old 08-13-2013
With this input file:

****************Start Display Current Environment **********
Host OPerating Syatem is linux, version
Java version
[8/6/13 15:10:30:000 EDT] log message
[8/8/13 15:32:47:000 EDT] log message
[8/10/13 15:55:38:000 EDT] log message
[8/12/13 16:23:59:000 EDT] log message
[8/12/13 17:12:48:000 EDT] log message
[8/12/13 18:03:39:000 EDT] log message
[8/12/13 18:08:42:000 EDT] log message
[8/12/13 18:27:04:000 EDT] log message
[8/12/13 19:16:21:000 EDT] log message
[8/12/13 19:58:21:000 EDT] log message
[8/12/13 20:38:28:000 EDT] log message
[8/12/13 21:30:13:000 EDT] log message
[8/12/13 21:55:32:000 EDT] log message
[8/12/13 22:47:38:000 EDT] log message
[8/12/13 22:53:42:000 EDT] log message
[8/12/13 23:07:12:000 EDT] log message

I get this:

[8/12/13 22:47:38:000 EDT] log message
[8/12/13 22:53:42:000 EDT] log message
[8/12/13 23:07:12:000 EDT] log message

Please try you code against this file.
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# 16  
Old 08-13-2013
OK can you explain the code in clear that you used. So that i will try with the original log file i have.

Thanks for the help.
# 17  
Old 08-13-2013
v=$(date --date "-1 hour" +"-vY=%-y -vT=%-m -vD=%-d -vH=%-H -vM=%-M")

This builds a string with current time - 1 hour eg:
-vY=13 -vT=8 -vD=12 -vH=23 -vM=4

This is used as a command line options to awk to set the value of 5 variables Y,T,D,H and M for Year, monTh, Day, Hour, Minute.

-F '[[ /:]' set field seperator to one of [ / space and :

Now input lines are split up into fields so from [8/12/13 23:07:12:000 EDT] log message
we get $1= $2=8 $3=12 $4=13 $5=23 $6=07 $7=12

Below will set variable v if date/time is less than 1 hour ago (i.e. year is greater than current year OR year is current year and month is greater than current month OR etc)
  $4+0>Y ||
  $4+0==Y&&$2+0>T ||
  $4+0==Y&&$2+0==T&&$3+0>D ||
  $4+0==Y&&$2+0==T&&$3+0==D&&$5+0>H ||
  $4+0==Y&&$2+0==T&&$3+0==D&&$5+0==H&&$6+0>M {v=1}

And finally print line if line starts with [ and variable v is set:
This User Gave Thanks to Chubler_XL For This Post:
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