searching for words between delimeters from the rear

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# 1  
Old 08-04-2009
Power searching for words between delimeters from the rear

i need to pick up dates and times from the file names which are of unequal length. The dates and time are delimited by dot. I am interested in getting the strings between the delimeter for fields -3, -4, -5 from behind (rear) so that the out put looks like :


I have tried with awk -F'.' '{print $3 '.'$4 '.'$5'}' filename
There is no consistency in the extractiion and i dont know how to read from the back which would have been more consistent.

See examples of filenames below:






I need help.


Last edited by oktbabs; 08-04-2009 at 01:46 PM..
# 2  
Old 08-04-2009
Give in and out example. Easier to give solution.
# 3  
Old 08-04-2009
sed 's/.*\([0-9]\{6\}.[0-9]\{6\}.[0-9]\{3\}\).*/\1/' file

Please use [code] tags when you post code or data sample.
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