Thanks for the answer, but since I am very unexperienced with UNIX and programing I dont really understand how to proceed with the following commands.

for filename in `cat somefile`
do
ls -lc $filename >> somefile2
done
mv somefile2 somefile

Should I write this in a script? In that case I don't really now how to do it, can u possibly give un example.

Sorry for my low level of understanding....