Here's an example of how to list the files in a folder in Node.js on Linux:

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const fs = require("fs");

fs.readdir("/path/to/folder", (err, files) => {
  if (err) throw err;

  console.log(files);
});

This will return an array of strings representing the filenames in the directory /path/to/folder.

You can also use the fs.promises.readdir() method to achieve the same result using promises, like this:

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const fs = require("fs").promises;

async function listFiles(dir) {
  try {
    const files = await fs.readdir(dir);
    console.log(files);
  } catch (err) {
    throw err;
  }
}

listFiles("/path/to/folder");