Copy random file from subfolder to new subfolders
To be used when i want to copy one file from many subfolders in a source folder to local subfolders
for i in $(ls /source/of/folders); do pat="/source/of/folders/$i/"; cp $pat/$(ls $pat | shuf -n 1) $i/.; done
If I want to copy the n first files from one subdirectory to another
find <source> -maxdepth 1 -type f | head -n <number of files to copy> | xargs -I{} cp "{}" <destination>