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How can I recursively count files in a Linux directory?

To recursively count files in a Linux directory (and its subdirectories), use find along with wc -l. Here’s the most common approach:

find /path/to/directory -type f | wc -l

Explanation:

  1. find /path/to/directory: Searches within the specified directory (recursively by default).
  2. -type f: Restricts the search to regular files only (ignoring directories, symlinks, etc.).
  3. | wc -l: Pipes the list of found files to wc (word count) with -l (line count), giving you the total number of files.

More Tips

  • Counting Specific File Types
    For instance, to count only .txt files:

    find /path/to/directory -type f -name "*.txt" | wc -l
  • Excluding Certain Directories
    If you want to skip folders like node_modules:

    find /path/to/directory -type d -name "node_modules" -prune -o -type f -print | wc -l

    This command prunes node_modules but counts all other files.

  • Potential Edge Cases

    • If you have millions of files, the command might be slow or produce a large output buffer before counting.
    • Use -maxdepth or -mindepth if you need to restrict how deep the search goes.

Further Learning

If you’re looking to solidify your scripting, algorithmic, and coding-interview skills, consider these two courses from DesignGurus.io:

  1. Grokking Data Structures & Algorithms for Coding Interviews
    A thorough exploration of core data structures and algorithmic techniques, crucial for writing efficient code and shell scripts.

  2. Grokking the Coding Interview: Patterns for Coding Questions
    Learn the key coding patterns repeatedly tested in interviews, enabling you to solve problems more systematically and confidently.

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