What happens when a hotel uses tablets for lights

Personally, I only rarely get good WiFi access in hotels with “free WiFi,” but apparently one hotel in London is confident in their network, and uses Android tablets instead of light switches. But oops, they use physical ethernet cables, and because people who run hotels generally don’t know much about network security, it gets comically bad very quickly. The full story is here.

How to “pin” a screen in Android 5 (Android screen pinning)

Android FAQ: How do I “pin” a screen in Android?

Pinning a screen in Android requires a setting change. Once you’ve made that change, you can “pin” a screen so it is always shown when you log into your Android device. Here’s how to do it.

Android screen pinning setting

To pin a screen in Android, you first have to go into your settings and make a change. So go to the Settings app, then tap Security. When you scroll down you’ll see a “Screen pinning” setting, as shown here:

How to log into an iPad by throwing an Android tablet onto it

I have no idea why this works, but if I throw/slide my Google Nexus 9 tablet onto my old iPad 2, the iPad wakes up and logs in automatically. You can see it happen in this 30-second video:

I’m not touching any iPad buttons when this happens. My guess is that the iPad 2 thinks that I just removed a magnetic cover, but really, I have no idea why it does this.

Installing security updates only with CentOS yum

If you want to install only security-related updates to your CentOS Linux installation using the yum command, it looks like the yum-plugin-security plugin might be a good option. (I’m having a few problems with it at the moment, so I can’t say that this is the absolute solution.) I found it on this page and this page.

Social networking - Who do you trust?

I've been trying to do a lot of things lately to make my "social networking" life easier, but technology keeps beating me down. Yesterday I created some Safari web clips so I could see Twitter, Facebook, and several other web pages on my Mac dashboard (dashboard widgets), but the Twitter and Facebook web clips kept crashing, so after several tries, I gave up.