Delete all files except the newest 3 in bash script

Question

Question: How do you delete all files in a directory except the newest 3?

Finding the newest 3 files is simple:

ls -t | head -3
         


        

Answer 1

ls -t | tail -n +4 | xargs -I {} rm {}

Michael Ballent's answer works best as

ls -t | tail -n +4 | xargs rm --

throw me error if I have less than 3 file