How to pre-configure Raspberry PI for remote SSH and Wifi

Many Raspberry PI projects are used headless (with no display device attached or if a display device exists, it’s not connected to the default HDMI or analog outputs).
In these instances it’s time consuming to connect the PI to a monitor and keyboard just to configure remote SSH access and wireless connection details (and in rare occasions it may even not be possible).

Luckily, the good folk developing Raspbian implemented shortcuts and workarounds that allow things to be pre-configured even before booting the PI.

Setting up guest wireless access on Tomato

Guest wireless access is handy when you want to separate guest devices (your friends’ phones and laptops) from your own devices connected to the main network.

To get started, you need a router capable of guest wireless (not every router can do this) already set up and running either DD-WRT or Tomato. This tutorial explains how to set up a router running Tomato that is used only as access point (WAN is disabled/unplugged).

How to recover saved wifi passwords in Android

Be it your neighbour’s network or your friend’s (whom you visit once a year) wifi, those pesky twisted hard-to-remember passwords ask to be forgotten. But your trusty Android phone remembers them all.

Wouldn’t it be great if it could tell them to you? Well, if you have a rooted device, you’re in luck. You can quickly re-discover the password of all networks you’ve saved them for. Use your favourite file manager and…