How to crop images in same dimension W/H (Ubuntu 16)

Question

I have a lot of images of accommodations and restaurants for my webpage, but each images has different sizes. For example, I have one image of 300x250 and another one of 550x300.

I want to make squares cropping this images from 300x250 to 250x250 and 300x550 to 300x300 for example.

I find some command to crop images with "imagemagic" but I can't crop as square, centered.

I want to make a copy of all my images squared and then resize all to the same size.

I try with this command but I get "No such file or directory" error.

find . -name '*.jpg' -type f -exec bash -c 'convert -define jpeg:size=200x200 ${0%.jpg}  -thumbnail 100x100^ -gravity center -extent 100x100  $0_thumbnail.jpg'  {} \;

Now, I can crop images with this code:

find . -name '*.jpg' -type f -exec bash -c 'convert -define jpeg:size=200x200 $0  -thumbnail 100x100^ -gravity center -extent 100x100  ${0}_thumb.jpg'  {} \;

But cropped image gets this name "X.jpg_thumb.jpg". How can I modify this command to create X_thumb.jpg filename?

[SOLVED] This command solve my problem "%.*"

 find . -name '*.jpg' -type f -printf "%f\n" -exec bash -c 'convert -define jpeg:size=200x200 $0  -thumbnail 100x100^ -gravity center -extent 100x100  ${0%.*}_thumb.jpg'  {} \;

Answer 1

SOLUTION

find . -name '*.jpg' -type f -printf "%f\n" -exec bash -c 'convert -define jpeg:size=200x200 $0  -thumbnail 100x100^ -gravity center -extent 100x100  ${0%.*}_thumb.jpg'  {} \;