Thanks Corona688 and bipinajith

I notice that the concatenated file is saved in the created folder.. The main point is to make a copy of all the files for the same date in a new folder... And the concatenated file should be saved in the original folder where are all the files.. Thanks for your help

---------- Post updated 11-23-12 at 05:46 AM ---------- Previous update was 11-22-12 at 01:51 PM ----------

Thanks guys

I have done a little change in your script to like that,, and now is working as I want. thanks again.

Code:

printf "%s\n" dsd*.txt | awk -F_ ' { print substr($2,1,6); }' | sort | uniq |
while read file_dt
do
        
mkdir -p folder/dsd_${file_dt}
       cp dsd*${file_dt}.txt folder/dsd_${file_dt}
      
      cat dsd*${file_dt}.txt >> folder/dsd_${file_dt}.txt

done

exit 0