A BASH script to delete the contents of all child directories in the current path while retaining the child directories themselves.

delete-child-directory-contents.sh

#!/bin/bash

############################################################################
# This script iterates over each child directory from where it runs
# and deletes ALL contents of those child directories, while leaving
# the directory itself intact.
# 
# Copyright 2020 Eric A. Soto, eric@issfl.com
# 
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the 
# Software is furnished to do so, subject to the following conditions:
# - The above copyright notice and this permission notice shall be 
#   included in all copies or substantial portions of the Software.
# - THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
#   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
#   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
#   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 
#   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
#   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 
#   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
############################################################################

echo "You are about to delete the content of EACH CHILD DIRECTORY under $(PWD)"
echo ""
# Wait for the user to press any KEY to proceed or allow them to Ctrl+C
read -n1 -rsp $'Press any key to continue or Ctrl+C to exit...\n'

for DIR in $(find . -maxdepth 1 -mindepth 1 -type d); do
  DELETE_TARGET=${DIR}/*
  echo "Deleting $DELETE_TARGET"
  rm -rf $DELETE_TARGET
done