How to Count the Number of Subdirectories Without the Execute Bit in Linux

Learn how to easily count subdirectories that lack the `execute bit` in Linux using efficient command-line techniques. --- This video is based on the question https://stackoverflow.com/q/70232801/ asked by the user 'Simd' ( https://stackoverflow.com/u/1473517/ ) and on the answer https://stackoverflow.com/a/70232846/ provided by the user 'KamilCuk' ( https://stackoverflow.com/u/9072753/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions. Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Count the number of subdirectories without the execute bit Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l... The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license. If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com. --- Introduction If you're navigating through various directories in a Linux system, you may come across a situation where you need to determine how many of those directories don't have the execute permission set. The execute bit controls whether a user can enter or search a directory, which can be a crucial aspect of managing security and user access within your file system. In this guide, we'll explore how to count the number of subdirectories that lack the execute bit. We will discuss a few efficient command-line approaches so you can choose the one that best fits your needs. Understanding the Execute Bit In Linux, permissions for files and directories are categorized into three types: Read (r): Permission to view the contents. Write (w): Permission to modify contents. Execute (x): Permission to run a file or, for directories, the ability to enter (or 'search') the directory. When a directory does not have the execute bit set, users will not be able to traverse into that directory, even if they can see its name. Counting Subdirectories Without the Execute Bit Here, we'll cover several commands that can help you count the subdirectories lacking the execute permission. We will dive into each approach, making it simple and clear. Using the find Command The find command is a powerful utility for searching files and directories in Linux, and you can leverage it to count subdirectories lacking the execute permission. Count Directories Without Execute Permission for Current User [[See Video to Reveal this Text or Code Snippet]] -mindepth 1: This option prevents the command from listing the current directory (.). -maxdepth 1: Restricts the search to the immediate subdirectories. '!' -executable: This part specifies that we're interested in directories that are not executable (not searchable) by the current user. | wc -c: This counts the number of output characters, which corresponds to the number of directories found. Count Directories with Zero Executable Bits If you want to specifically count directories that have no executable bits set: [[See Video to Reveal this Text or Code Snippet]] -perm /111 checks for at least one of the execute permission bits (owner, group, or others). By using the negation ('!'), it counts those that do not have any execute permissions. Count Directories with Two or Fewer Executable Bits To check for directories that have two or fewer execute bits set: [[See Video to Reveal this Text or Code Snippet]] -perm -111 ensures that all three execute bits must be set for a directory. The negation ('!') means we are counting those that do not satisfy this condition. Conclusion Counting subdirectories that lack the execute bit is essential for maintaining proper access control in your Linux environment. With the find command, you have multiple ways to tailor your search based on permissions. This command provides a concise and efficient method for managing and auditing your directories. By understanding these commands and utilizing them effectively, you'll be better equipped to handle permissions and improve your overall directory management strategy in Linux. If you have any further questions or need clarification on any topic covered, feel free to ask in the comments below!