Tips!

I am use :

• for, echo, mv, tr, sed

Command:

Get all files by names extension otf, in current location.

While we use *, the key pass value from variabel, and '.otf is limiter' of getter. You can, remove the otf extension. if you most get all files .

for variabel in *.otf

Rename files, (easy understanding).

mv "oldfiles_name" "newfiles_name"

Show text, (easy).

echo "print arguments"

How to lower case the file name ?

tr '[:upper:]' '[:lower:]'

And the last, i m change the char '-' to '_'.

sed s/-/_/g

Finnal code:

#/bin/bash

for filesname in *.otf
mv "$filesname" "$(echo "$filesname" | tr '[:upper:]' '[:lower:]' | sed s/-/_/g)"

Thank you for read my post. If you dont understand my word, in this post. I'm so sorry :'(