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fs.copyFile() copies a file in Node.js.

process.hrtime() returns high-resolution real time in Node.js.

The crypto module provides cryptographic operations.

fs.stat() retrieves file statistics in Node.js.

process.uptime() returns the uptime of the Node.js process.

The net module provides network functionality in Node.js.

The assert module provides a set of assertion functions for testing.

The dns module provides DNS resolution functionality.

The readline module reads data from a readable stream line by line.

fs.createWriteStream() creates a writable stream for a file.

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