- readFileSync
Synchronously reads the entire contents of a file.
- existsSync
Synchronously tests whether or not the given path exists by checking with the file system.
- readFile
Asynchronously reads the entire contents of a file.
- readdirSync
Synchronous readdir(3) - read a directory.
- writeFile
Asynchronously writes data to a file, replacing the file if it already exists.