remove last 12 characters of a file name

remove files name

You could use rename. From inside the directory:

rename -n 's/(.*).{12}/$1/' *


Remove -n after testing to actually rename the files. Replace {12} with {whatever number of characters you want to delete from the end of the name}

Explanation

s/old/new/' replaceoldwithnew`
(.*) save any number of any characters...
.{12} the last twelve characters whatever they are
$1 the characters saved with ()


// credit
//https://askubuntu.com/questions/873617/remove-last-n-characters-of-filenames-in-a-directory