Linux batch conversion: Change quality of jpg with convert but keep its name

Question

If I convert my images with

convert -quality 80% *.jpg 

It works, but the software changes the file names to the first one it picks. How can I keep the name or even replace the previous image with that of a lower quality.

Answer 1

Try this instead:

mogrify -quality 80% *.jpg 

Answer 2

convert command help:

convert input-file [options] output-file

Now a little script to convert all jpg files to 80% quality of original under current directory

for file in *.jpg; do   convert "$file" -quality 80% "$file" done;