Quick snippet to rename every file within a directory to have a prefix of the directory they reside in as part of the file name. If the directory name has a space in it, replace spaces with underscores for the file name. Run from within the directory in question.

base=$(basename "$PWD"| tr ' ' '_'); for file in *; do [ -f "$file" ] && mv "$file" "${base}_$file"; done

It does the following:

• Gets the name of the current directory, replacing spaces with underscores, and saves into the variable base
• Iterates through everything in the directory in a for loop
• If the item is a regular file, execute the mv command to rename the file to include the contents of the base variable as a prefix
  • It uses BASH substitution to prepend the directory name to the new file name

This was helpful when dealing with a scanning project where many files had the same filename in different directories, which confused stacking images within Immich.