executeCommand has been removed in favor of connect and manualHack, which is what people have been asking for.

doc/source/netscript/singularityfunctions/connect.rst

@@ -0,0 +1,20 @@
+connect() Netscript Function
+============================
+
+.. js:function:: connect(hostname)
+
+    :RAM cost: 2 GB
+    :param string hostname: hostname of the server to connect.
+    :returns: ``true`` if the connection was a success.
+
+    If you are not in BitNode-4, then you must have Level 1 of Source-File 4 in order to use this function.
+
+    This function will connect you to the specified server if it's directly connected to the current server.
+    You can also pass in 'home' to return to your home server from anywhere.
+
+    Examples:
+
+    .. code-block:: javascript
+
+        connect("joesguns");
+        connect("CSEC");