Shell Programming and Scripting

dsd01_121104.txt
dsd01_121105.txt
dsd01_121106.txt
dsd03_121104.txt
dsd03_121105.txt
dsd03_121106.txt
dsd04_121104.txt
dsd04_121105.txt
dsd04_121106.txt
dsd05_121104.txt
dsd05_121105.txt
dsd05_121106.txt
dsd06_121104.txt
dsd06_121105.txt
dsd06_121106.txt
dsd07_121104.txt
dsd07_121105.txt
dsd07_121106.txt
dsd08_121104.txt
dsd08_121105.txt
dsd08_121106.txt
dsd09_121104.txt
dsd09_121105.txt
dsd09_121106.txt
dsd10_121104.txt
dsd10_121105.txt
dsd10_121106.txt
dsd11_121104.txt
dsd11_121105.txt
dsd11_121106.txt
dsd12_121104.txt
dsd12_121105.txt
dsd12_121106.txt

dsd_121104.txt " all files for day 121104 concatenated "
dsd_121105.txt " all files for day 121105 concatenated "
dsd_121106.txt " all files for day 121106 concatenated "

dsd_121104 "inside all files for day 121104"
dsd_121105 "inside all files for day 121105"
dsd_121106 "inside all files for day 121106"

#!/bin/ksh

ls dsd*.txt | awk -F_ ' { print substr($2,1,6); } ' | sort | uniq > dates.list

while read file_dt
do
        mkdir -p dsd_${file_dt}
        for file in dsd*${file_dt}.txt
        do
                cat ${file} >> dsd_${file_dt}/dsd_${file_dt}.txt
        done
done < dates.list

exit 0

#!/bin/ksh

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

exit 0

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

printf "%s\n" /tmp/dsd*.txt |
awk -F"dsd" '{FS="_";$0=$0;a[$2]++}END{for (i in a) {cmd="cat /tmp/dsd*_"i" > /tmp/dsd_"i"";system(cmd)}}'