UNIX for Dummies Questions & Answers

#!/bin/bash
cd /abcd/efgh/ijkl/mnop/ #(Source directory)
for fname in `ls -ltr *.abc | tail -1 | awk '{print $9}'` #(list "ls -ltr" only most current files that end
                                                          # with "*.abc" and then take the 9th field and
                                                          # assign it to fname.  So fname is assigned
                                                          # "ABCD_ABC_Abc_AB0123.abc")
do
  if [ -f /abcd/efgh/ijkl/mnop/qrst/$fname ] #(checks "-f" destination directory if file fname exists)
  then
     echo "File exits" #(It exits nothing happens)
     exit 0
  else
  cp $fname /abcd/efgh/ijkl/mnop/ #(if it doesn't exist copies fname to destination directory)
  echo "Copied" $fname
  fi
done