bash - for loop for multiple extension and do something with each file

Question

I'm trying to write a for loop in bash to get the files with extension of jpg, jpeg, png, this i my attempt, but does not work

for file in "${arg}"/*.{jpg,jpeg,png}; do echo ${arg}-something.jpg > z.txt ; done;

basically, i want to get the name of the file with those extension in the current folder, and do something with each file, then output the filename back with a new extension.

Answer 1

You are not using $file anywhere. Try

for file in "$arg"/*.{jpg,jpeg,png} ; do
    echo "$file" > z.txt
done