Added mv command

commands/mv.js

@@ -0,0 +1,22 @@
+//importing filesystem
+const fs = require('fs');
+
+//function movinf the file
+function mv(old_path, new_path) {
+    source = './'
+    var old_path_wrt = source.concat(old_path);
+    var new_path_wrt = source.concat(new_path);
+
+    fs.rename(old_path_wrt, new_path_wrt, (err) => {
+        if (err) {
+            console.log("Invalid path");
+        } else {
+            console.log("File moved");
+        }
+    });
+
+
+}
+
+//exporting the mv function
+module.exports = mv;