In my quest to do as many things over IPv6 now that it’s supported not only by my VDSL line at home but also by my mobile network operator, the last success story I reported here was about how to update my IPv6 DNS entry whenever the dynamic IPv6 address of one of my servers at home changed. The procedure works like a charm but unfortunately I found a big bug in the DNS resolver in my Fritzbox VDSL router that pretty much forestalls my IPv6 home server ambitions for the moment.
Author: Martin
Book Review – Inside The Machine
Back in 2013 I published a post on the different levels on which a computing device could be understood from a working level down to the physics behind the individual gates. One facet that has been missing for me so far was a look at the features that make today’s CPUs so powerful. “Inside the Machine” by John Stokes filled that gap for me.
32-bit vs. 64-bit Memory Impact
One downside of moving from 32-bit to 64-bit is that memory pointers are twice their size. In other words programs in memory require more RAM. But does it matter in practice?
To find out I ran the 32-bit version of Ubuntu 14.04 from a USB stick and compared the used and available memory in different situations on the same system when booting from a different memory stick with the 64-bit version of the OS.
Good Advice To Block, Detect and Mitigate Ransomware Damage In Companies
Today I came across this great article by Robert Penz in which he describes measures how companies can reduce the risk of Ransomware encrypting their files on network shares and other devices in the local network. Also, he describes how a company can prepare itself in case it still happens to reduce their downtime as much as possible. I found one of his suggestions of particular interest: Snapshots of network shares.
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Hiccups While Moving To 64-bit On My Media PC
After my initial thoughts about moving from Linux 32-bit to 64-bit I couldn’t of course hold back for long and decided to upgrade my Media PC I mostly use for video streaming from the 32-bit flavor of Ubuntu 15.10 to the 64-bit flavor. It should have been a straight forward reinstall, what could possibly go wrong!? Or so I thought…
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One German LTE Network Operator Now On-Air with 50 MHz
When it comes to investigative reporting in the telecommunication domain, German telecoms news website Teltarif certainly is at the forefront. Recently they noticed that the public network coverage maps of one of the network operators in Germany now show that in many cities, they have deployed LTE in three different frequency bands.
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The Samsung SSD Bug Caught Me Again
I’ve been using SSDs for many years now and I’m more than happy as the speed difference on a notebook compared to hard disks is just like day and night. Unfortunately I use a one terabyte Samsung 840 Evo in my notebook that has now bitten me for the second time.
Is It Time To Move To AMD64?
Yes, I’m a comparatively late convert to Open Source as I’ve only installed Linux on a production machine I used for everyday work back in 2009. At the time there wasn’t a lot of discussion about using a 64 bit version of Linux on x86, the mainstream was still on 32 bit at the time. Not a big problem, most computers only came with 2 GB RAM at most so there were only few advantages of using a 64 bit OS if the processor supported it. In the meantime a lot has happened and I decided that it’s time for me to finally make the move.
LTE And The Number Of Simultaneously Connected Users
Recently I read this very interesting post that analyzed how many users can be connected to an LTE eNodeB simultaneously. As the author says in the article there is no single answer to this as many factors are playing into the game. From a pure uplink signaling point of view there can be well over 1000 users simultaneously in RRC-Connected state. In practice I wouldn’t be surprised if networks set that number way lower as that number is far too high to give anyone a halfway decent speed experience. So how many might there be connected simultaneously to a base station today? Let’s play with some numbers.
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So Glibc Is Not Statically Linked!?
When I first heard about the news of a serious security vulnerability in glibc I thought that I would soon see a lot of programs of my Linux distributions being updated. That’s because I faintly remember that I once read somewhere that in Linux, libraries are often compiled into the application instead of dynamically linked at runtime. But I guess that was not quite true, at least not for glibc anyway. So far I’ve only seen an update of the glibc library itself. Since then no other programs have been updated due to statically linking that library. So if that holds true we might have been luckier than I thought. Would be nice for a change!