The arping application is a simple command that will allow you to ping devices by hostname, IP address, or MAC address. The unfortunate part is that most device will not respond to the arp requests, which are directed broadcast ICMP echo requests, though there are some out there that do. I go into more detail below regarding pinging via MAC address by providing an example of the typical output, example output when a MAC address responds to the ICMP echo requests, and details about how to configure hosts to respond to these ICMP echo requests. I also show a couple of the switches available with arping and provide examples of using arping to ping devices by IP and host.
I have never had an Android device before so pretty much everything is new to me at this point. I will be writing a bunch of articles regarding the basics of Android and more specifically the basics of Android 4.2 on a Google Nexus 7. In the process of working to root the Nexus 7 I needed to backup everything on the Nexus 7 device including everything that has been configured to date. I also have taken a bunch of screenshots that I wanted to make sure got backed up before I proceed with rooting it. Backing up the Google Nexus 7 is easy but there are a couple steps to make sure you get everything which I have outlined below.
I use TextMate on Mac OSX Mountain Lion to write notes. One thing I find myself needing a bunch is to insert the current date and time so I can track specific events. For instance if I am writing an article for Question-Defense.com and I am doing the initial formatting in TextMate, which is a typical scenario for me, I might take ten screenshots and I like to note the current date/time in case I get pulled away from the article writing for something else. So having a keyboard shortcut that outputs the current date/time is really valuable so I don’t have to type it out by hand. Below I describe how to install a OSX Service that will provide various date/time outputs via Keyboard Shortcuts. The OSX Service called WordService also provides a bunch of extra awesome services which I briefly touch on below as well.
If you recently purchased a Google Nexus 7 you likely will think, like I did, that you will plug it into your Mac and it will mount automatically so you can browse the disk. Unfortunately that is not the case and it takes installing the Android File Transfer app. The reason for this is the fact that Android uses the MTP or Media Transfer Protocol to talk to OSX Mountain Lion. Follow the directions below to enable communication between your Mac and Google Nexus 7 running Android.
If you use btscanner, which is a Bluetooth scanner found in Backtrack Linux, a lot like I do then you will notice that the Public OUI list included is pretty far out of date. The OUI or Organizationally Unique Identifier list is what matches MAC addresses to manufacturers or vendors. This is how you can determine who produced a specific product that is talking on a network for instance a Bluetooth device that is attempting to communicate with your phone or your computer.