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How to remove the date part of the file?

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# 1  
Old 10-08-2013
How to remove the date part of the file?
Hi Gurus,

I have file name like:
Code:
abcd.20131005.dat

I need to remove mid part of data
final name should be
Code:
abcd.dat

thanks in advance
# 2  
Old 10-08-2013
Code:
mv `ls *.dat` `ls *.dat | cut -d"." -f1,3`

# 3  
Old 10-08-2013
Parameter Expansion, read all about it in the manpage for your shell.
Code:
filename=abcd.20131005.dat

suf=${filename##*.}

filename=${filename%%.*}.$suf

echo $filename
abcd.dat

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