SHELL

count number of files linux

ls | wc -l #Count files on current directory
ls path/to/dir | wc -l #Count files on specific directory path

count number of files in directory linux

ls -R|wc -l

find number of files in a directory linux

find -maxdepth 1 -type d | while read -r dir; do printf "%s:	" "$dir"; find "$dir" -type f | wc -l; done