title: bash script to get files from a dir and compare them with another dir
body: <p>suppose i have a Dir1 with only files <em>( t1.txt, t2.txt, t3.txt)</em>
  how can i get a list of the files name only in a bash script that allows me to compare it to another list of files in Dir2 and find the missing files without using <strong>rSync</strong></p>