When should I use +?

You should use + with the -exec option in the find command when:

1. Efficiency: You want to improve performance by executing the command once for all matched files instead of executing it separately for each file. This reduces the overhead of starting a new process multiple times.

2. Command Compatibility: The command you are using can accept multiple file arguments. For example, commands like cat, mv, cp, and chmod can handle multiple files at once.

3. Batch Processing: You want to perform an operation on a batch of files simultaneously. For instance, if you are copying or moving a large number of files, using + allows you to do it in one go, which can be faster than processing each file individually.

Example Scenarios for Using +:

• Concatenating Files:

  find . -type f -name "*.txt" -exec cat {} + > combined.txt

  This concatenates all .txt files into combined.txt in a single command execution.

• Moving Files:

  find . -type f -name "*.jpg" -exec mv {} /path/to/destination/ +

  This moves all .jpg files to the specified directory in one command.

• Changing Permissions:

  find . -type f -name "*.sh" -exec chmod +x {} +

  This makes all .sh files executable in one command execution.

When Not to Use +:

• If the command you are using does not support multiple file arguments or requires processing files one at a time, you should use \; instead.
• If you need to handle errors for each file individually, using \; allows you to do so, as each command execution is separate.

In summary, use + when you want to optimize performance and your command can handle multiple files as arguments.