calibredb:tldr:13ea8

The command "calibredb add -r ${path-to-directory}" is used to add books to the Calibre database from a specific directory.

Here's a breakdown of the command:

• "calibredb" refers to the command-line tool in Calibre, which is used for managing the Calibre library and performing various operations on ebooks.
• "add" is the specific sub-command of "calibredb" used to add books to the Calibre database.
• "-r" stands for "recursive" and is used to add books recursively from the specified directory and its subdirectories. This means that all books in the specified directory and its subdirectories will be added to the Calibre database.
• "${path-to-directory}" should be replaced with the actual path to the directory where the books are located. This could be a local directory path like "/home/user/ebooks" or a network directory path like "//server/books".

Overall, the command is used to bulk add books to the Calibre database from a specific directory and its subdirectories.