Sticky bits are primarily used for which type of file?

The sticky bit is a permission setting that is primarily used with directories in Unix-like operating systems. When the sticky bit is set on a directory, it restricts the ability of users to delete or rename files within that directory to only the file's owner, the directory's owner, or the root user. This is particularly useful in shared directory environments, such as /tmp, where many users have write access; it prevents users from inadvertently or maliciously deleting one another’s files.

While executable files can have a sticky bit set, its specific function regarding execution is not the focus of its primary utility. Symbolic links and configuration files do not typically utilize the sticky bit, as they serve different purposes in the file system. Therefore, understanding that the sticky bit enhances security and management of user permissions in directories clarifies why the correct answer emphasizes the importance of this file type.