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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for July 1st, 2016

The new Google Maps/Earth satellite imagery allows to count our solar panels…

Posted by jpluimers on 2016/07/01

I checked our home using the recently improved Google satellite imagery: from Google Earth you can get better detail than from Google Maps.

You can even count our solar panels and see one is misaligned after a storm (a few days after this image was taken I managed to re-align that panel).

13 PV panels and one hot water panel lowered our energy bills for more than EUR 1000/year.

–jeroen

Posted in About, Google, GoogleEarth, GoogleMaps, Personal, Power User, Solar Power | Leave a Comment »

Mac OS X: finding the DNS servers available

Posted by jpluimers on 2016/07/01

DNS and Mac OS X are a bit of a tricky situation as OS X can use more than the default DNS servers: its resolve can do a multi-client DNS search.

The default DNS servers can be listed like this:

scutil --dns | grep 'nameserver\[[0-9]*\]' | sort | uniq

The effective DNS server like this:

dig whoami.akamai.net | grep "^;; SERVER" | cut -c 12-

Sometimes you want to know if you have manually configured DNS servers, or only DHCP assigned ones. This statement shows that for my Wi-Fi network-service:

networksetup -getdnsservers Wi-Fi

Because of the multi-client setup, you need to run this for all network-services configured on your OS X installation. You can get the list like this:

networksetup -listallnetworkservices

I’ve not yet found a way to list only active services, as the networksetup documentation indicates the -listnetworkserviceorder option will mark inactive ones with (*), but it reality does so only for disabled ones. So this does not work:

networksetup -listnetworkserviceorder

I might one day dig into combining the output of ifconfig with networksetup to figure out a shell based solution to this question.

–jeroen

Posted in Apple, OS X, OS X Lion, OS X Mountain Lion, OSX Yosemite, Power User | Leave a Comment »

windows 7 – Available memory differs by several GiB from what is installed – Super User

Posted by jpluimers on 2016/07/01

Very interesting question and answers: windows 7 – Available memory differs by several GiB from what is installed – Super User.

Basically the missing memory can be due to:

  • Windows licensing limitations
  • Mapping of device memory into virtual memory space (especially on x86 systems)

This affects both server and client versions of Windows. Client versions are more restrictive because of the vast amounts of potentially faulty drivers involved.

Some links (read the full question for details):

–jeroen

Posted in Power User, SysInternals, Windows, Windows 7, Windows 8, Windows 8.1, Windows 9, Windows NT, Windows Server 2000, Windows Server 2003, Windows Server 2003 R2, Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Vista, Windows XP | Leave a Comment »

 
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