Create multiple directories and files in Bash
Create many directories and subdirectories under every directory:
1mkdir dir_prefix{1..50}
2for dir in $(ls); do mkdir "$dir"/subdir; done;
Create file in within every folder and under subdirectories:
1find . -type d -exec touch {}/file.dat \;
2for dir in $(ls); do touch "$dir"/subdir/file.dat; done;
Find or remove files created some days ago:
1for f in $(find /directory -mtime +5); do rm $f; done