> For the complete documentation index, see [llms.txt](https://42-guide.gitbook.io/42-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://42-guide.gitbook.io/42-guide/piscine-life/shell01/find_sh.md).

# find\_sh

**Objective:**

Write a shell script named `find_sh.sh` that searches for all files ending with `.sh` in the current directory and its subdirectories. The script should display only the file names **without the `.sh` extension**.

***

**Key Concepts:**

1. **File Searching**: Learn how to search for files in directories and subdirectories using the `find` command.
2. **Command Substitution**: Use the `basename` command to remove the `.sh` extension from file names.
3. **Shell Scripting**: Write a script that automates the process of finding and formatting file names.

***

**Script Implementation:**

Here’s the script you will use:

```bash
#!/usr/bin/env bash
find . -type f -name '*.sh' -exec basename -s .sh {} \;
```

***

**Explanation of the Script:**

Let’s break down the script line by line:

1. **`#!/usr/bin/env bash`**:
   * This is the **shebang**. It tells the system to use the `bash` shell to execute the script. Using `#!/usr/bin/env bash` is more portable than `#!/bin/bash` because it finds the `bash` interpreter in the user's environment.
2. **`find . -type f -name '*.sh'`**:

   * The `find` command is used to search for files and directories.
   * `.` specifies the current directory (and its subdirectories) as the starting point for the search.
   * `-type f` tells `find` to look only for **files** (not directories).
   * `-name '*.sh'` filters the results to only include files that end with `.sh`.

   **Example**: If your directory contains the following files:

   ```
   ./script1.sh
   ./folder/script2.sh
   ./folder/subfolder/script3.sh
   ```

   The `find` command will output:

   ```
   ./script1.sh
   ./folder/script2.sh
   ./folder/subfolder/script3.sh
   ```
3. **`-exec basename -s .sh {} \;`**:

   * The `-exec` option allows you to run a command on each file found by `find`.
   * `basename -s .sh {}`:
     * `basename` is a command that strips directory paths and optionally removes a suffix from a file name.
     * `-s .sh` tells `basename` to remove the `.sh` suffix from the file name.
     * `{}` is a placeholder for the current file found by `find`.
   * `\;` indicates the end of the `-exec` command.

   **Example**: For the file `./script1.sh`, `basename -s .sh ./script1.sh` will output:

   ```
   script1
   ```
4. **Final Output**:

   * The script will output the names of all `.sh` files without the `.sh` extension, one per line.

   **Example Output**:

   ```
   script1
   script2
   script3
   ```

***

**Testing the Script:**

To test your script, follow these steps:

1. **Create Test Files**:
   * Create a few `.sh` files in your directory and subdirectories:

     ```bash
     mkdir -p folder/subfolder
     touch script1.sh folder/script2.sh folder/subfolder/script3.sh
     ```
2. **Run the Script**:
   * Execute the script:

     ```
     ./find_sh.sh
     ```
3. **Expected Output**:
   * The output should be:

     ```
     script1
     script2
     script3
     ```

***

**Why This Script Works:**

* The `find` command locates all `.sh` files in the current directory and its subdirectories.
* The `basename -s .sh` command removes the `.sh` extension from each file name.
* The `-exec` option allows `find` to process each file individually.

***

**Additional Resources:**

* **`find` Command Documentation**: Learn more about the `find` command by typing `man find` or visiting the [GNU Findutils documentation](https://www.gnu.org/software/findutils/manual/html_mono/find.html).
* **`basename` Command Documentation**: Learn more about the `basename` command by typing `man basename` or visiting the [GNU Coreutils documentation](https://www.gnu.org/software/coreutils/manual/coreutils.html#basename-invocation).
* **Bash Scripting Guide**: For more information on writing bash scripts, check out this [Bash scripting tutorial](https://ryanstutorials.net/bash-scripting-tutorial/).

***

**Key Takeaways:**

* You learned how to use the `find` command to search for files in directories and subdirectories.
* You practiced using the `basename` command to remove file extensions.
* You worked with the `-exec` option to process files found by `find`.


---

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