Bitburner utility function to create a generator that yields all hostnames.

get_all_hostnames.js

/**
 * Create a generator that yields all hostnames.
 *
 * @param {NS} ns
 * @param {String} hostname the host to start traversal at
 * @param {Set} seen used for internal recursion
 * @yields {String} a hostname
 */
export function* getAllHostnames(ns, hostname = "home", seen = new Set()) {
	seen.add(hostname);
	yield hostname;
	for (const peer of ns.scan(hostname)) {
		if (seen.has(peer)) continue;
		yield* getAllHostnames(ns, peer, seen);
	}
}

print_all_hostnames.js

// Example use of getAllHostnames
import {getAllHostnames} from "get_all_hostnames.js";

/** @param {NS} ns */
export async function main(ns) {
	for (const host of getAllHostnames(ns)) {
		ns.tprint(host);
	}
}