Move files to Folders

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# 1  
Old 07-22-2009
Move files to Folders

Hi Friends,
Below is my requirement and i am not clear how to approach this issue in unix programming.

I have a folder with 2500 files. The files are in below format.

and i need a program which will read each file from this folder and read the first 4 bytes and move the file to the folder (if it does not exist create a new one) with the name of the file.

read 1234_name1.txt , extract 1234 and create a folder 1234. Move the file to the folder 1234.

read 1234_name123.txt, extract 1234 and now the folder exist, now simply move the file to the folder 1234.

Your views/suggestions are highly appreciated.

Thanks for your help in advance.

# 2  
Old 07-22-2009
This works, but only exactly as you described your requirement!

ls -1 *.txt | grep "^[0-9]" | sed -e "s/\(^....\)\(.*\)/mkdir \1 2>\/dev\/null; mv \1\2 \1/" | ksh 2>/dev/null

remove the "| ksh ..." part to see what it will do, before it does it.
# 3  
Old 07-22-2009
should work:

for file in *.txt
  mkdir -p $mydir
  mv $file $mydir/$file

# 4  
Old 07-22-2009
for file in *.txt;do
tmp=`echo ${file%%_*}`
if [ ! -d $tmp ];then
  mkdir $tmp
echo $file
mv ${file} $tmp

# 5  
Old 07-23-2009
We call it directory and not folder in unix. Smilie Just a suggestion.
# 6  
Old 07-23-2009
Thanks Scott.
But i could not able to locate any folder with the name of the file and i do not get any error message as well.
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