Get file list

Generate the list of files inside a folder and save them in txt file

find /path_of_folder -type f -name "*.jpg" > .txt

Copy First 100 images

 ls -1 train_result/2025-06-12_final/eval_2/ | sort -n -t '.' -k 1 | head -n 100 | xargs -I {} cp train_result/2025-06-12_final/eval_2/{} train_result/2025-06-12_final/eval_2_100/