diff --git a/implement-shell-tools/cat/cat.js b/implement-shell-tools/cat/cat.js
new file mode 100644
index 000000000..5eb942126
--- /dev/null
+++ b/implement-shell-tools/cat/cat.js
@@ -0,0 +1,14 @@
+import process from "node:process";
+import { promises as fs } from "node:fs";
+
+const argv = process.argv.slice(2);
+if (argv.length != 1) {
+    console.error(`Expected exactly 1 argument (a path) to be passed but got ${argv.length}.`);
+    process.exit(1);
+}
+const path = argv[0];
+const content = await fs.readFile(path, "utf-8");
+
+console.log(content);
+const theNumberOfLines = content.split("\n").length;
+console.log(`The number of lines in the file is ${theNumberOfLines}.`);
\ No newline at end of file