conv1to2

@@ -2,15 +2,15 @@
 
 IFS=$'\n'
 if [ -z "$1" ]
-then echo give two strings
+then echo rename files in current folder replacing arg1 with arg2.
      exit
 fi
 
 for file in $( ls | grep "$1" )
-do mv -iv "$file" "$( echo $file | sed s/"$1"/"$2"/g )"
+do echo "$file" '->' "$( echo $file | sed s/"$1"/"$2"/g )"
 done
 echo 'sure?'
 read i
 for file in $( ls | grep "$1" )
-do echo mv -iv "$file" "$( echo $file | sed s/"$1"/"$2"/g )"
+do mv -iv "$file" "$( echo $file | sed s/"$1"/"$2"/g )"
 done