#!/bin/sh
#
echo "starting script"
echo "================="
rm file_name_clueless
touch "file name clueless"
ls -al file*
echo "================="
name="file name clueless"
na=`echo "$name" | tr ' ' '_'`
# "file name clueless" | tr ' ' '_'
mv "$name" "$na"

echo "================="
ls -al file*
echo "================="
echo " it worked! "
echo "================="