# Add "work." to all PDFs for f in *.pdf; do mv "$f" "work.$f"; done
: While dot folders are hidden in casual file listings, they can be made visible with certain commands or options. For example, in Unix-like systems, using ls -a or ls -A will list all files and directories, including those whose names start with a dot. filedot folder
All files live together — sorting by name groups related items automatically. # Add "work
: Easily distribute entire collections of data via a single URL. do mv "$f" "work.$f"