Archiv des Autors: Rainer Keller

Systemd — and how to a adapt for read-only NFS for Raspberry PIs Thinclients

Publiziert am 2. Dezember 2019 von Rainer Keller

Systemd is a powerful init-system for Unix; most of the Distros have moved away from sysv-based (System V, init calls scripts based on /etc/inittab and /etc/rc*.d). Notable forks of “traditional” (back-wards oriented?) distributions are Devuan (Debian without Systemd), funtoo (forked … Weiterlesen →

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Compiling GCC-SVN on MacOS 10.15

Publiziert am 10. November 2019 von Rainer Keller

It could be so easy, but with every MacOS release several things change and some break — again so with MacOS Catalina (aka MacOS 10.15). For GCC compilation, the directory /usr/include finally is gone for good (no .pkg-file to install … Weiterlesen →

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Compiling GCC-SVN on MacOS 10.14.5

Publiziert am 12. Juli 2019 von Rainer Keller

Again SIP has brought along some user-visible changes (see previous issue with Apple Mail). With the update of XCode 10 the directory /usr/include is not available anymore — not even after installing XCode and xcode-select –install. Without /usr/include, one cannot … Weiterlesen →

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Apple Mail cannot retrieve Emails after MacOS upgrade.

Publiziert am 2. Mai 2019 von Rainer Keller

Since MacOS 10.11 (El Capitan), Apple’s Operating System features System Integration Protection or short SIP, which protects certain directories from write-accesses. This protection gets more thorough by the versions. This led to a bunch of mishaps when upgrading my laptop. … Weiterlesen →

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Compile GCC-8.1 for Raspberry PI 3

Publiziert am 2. Juli 2018 von Rainer Keller

The British company Arm Holdings licences the ARM Central Processing Unit (CPU) design to manufacturers such as Samsung, Apple and Broadcom for their own chip-design, which may include further functionalities into the design. Since March 2018 the Raspberry PI 3B+ … Weiterlesen →

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Night sky

Publiziert am 22. August 2016 von Rainer Keller

The night over the Caroo shows an amazing display of stars! One clearly sees the milky-way.

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Sevilla Rock Art Trail

Publiziert am 20. August 2016 von Rainer Keller

The Khoi-Khoi, or sometimes Khoen-Khoen, are as combination as in Khoi-San are the indigeneous people inhabitating Sub-Saharan Africa for thousands of years. They lived as separate ethnic groups in pastoral (Khoikhoi) and hunter-gatherer live-style. With the arrival of various Bantu-ethnic … Weiterlesen →

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Sand dunes at De Hoop Nature Reserve

Publiziert am 4. August 2016 von Rainer Keller

The De Hoop Nature Reserve consist of two parts, one is the land which hosts Zebras, several types of Boks (Springbok and the rare Buntebok) and Ostriches, the other part is the adjoining Marine reserve. Driving the dust road towards … Weiterlesen →

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Whale Watching

Publiziert am 2. August 2016 von Rainer Keller

Today, we all went for a whale watching trip on a large boat in Hermanus. What an experience on a wonderfully sunny winter morning! The previous days, whales had been spotted at the east coast of Whalers Bay, but of … Weiterlesen →

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Hiking Simonsberg

Publiziert am 24. Juli 2016 von Rainer Keller

With my colleague and his girlfriend, we today hiked the highest mountain in the vircinity of Stellenbosch: it was the perfect hike for a Sunday. Starting with crispy clear air and bright sun at Tokara Deli, we hiked for about … Weiterlesen →

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Blowing with the wind

Publiziert am 13. Juli 2016 von Rainer Keller

As written before, it should rain! Badly. Two weeks ago, water-levels were rising again. But as it seems the unusually warm & sunny weather again prevails. The wind blows from North-East, aka from the continent, blowing over the mountain-range around … Weiterlesen →

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OpenFOAM static compilation

Publiziert am 8. Juli 2016 von Rainer Keller

OpenFOAM is quite a beast to compile — first of all with regard to size, but also when You go out of the normal. Actually on standard Linux like Ubuntu with a few packages pre-installed (like the system’s Open MPI, … Weiterlesen →

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Debian DPL

Publiziert am 5. Juli 2016 von Rainer Keller

Large crowd for Mehdi Dogguy’s talk on the state of Debian Project Leaders. He says, he’s the first African-born member of the DPL — and unfortunately the only one who volunteered in 2015. Debian is now down to only 10 … Weiterlesen →

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Taxi, Uber, Taxify

Publiziert am 5. Juli 2016 von Rainer Keller

Let me share my experience on getting around. My trip from the Airport in Cape Town to Stellenbosch I used standard Taxi first-and-foremost, because they were around and because I was approached by a nice gentleman who organized the Taxi-stand. … Weiterlesen →

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Booting ARM

Publiziert am 4. Juli 2016 von Rainer Keller

Just listened to a great talk by one of the Debian grandes Martin Michlmayr on Booting on ARM. Amazing what kind of work needed to be done to support the many armel devices. He also presented the bunch of work … Weiterlesen →

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DebConf2016 in Cape Town

Publiziert am 2. Juli 2016 von Rainer Keller

Today DebConf started in Cape Town and already listened to a very good talk of JD Bothan on “FLOSSing for healthier society“, a geeky title for a serious and gravely needed technologies to educate the masses about important data. His … Weiterlesen →

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Youth Day

Publiziert am 16. Juni 2016 von Rainer Keller

Today South Africa celebrates Youth Day to commemorate high school student’s uprising against the Bantu Education Act leading to the Soweto Uprising 40 years ago. The Cape Times Newspaper had good articles about the current state of affairs and those … Weiterlesen →

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Feathers!

Publiziert am 12. Juni 2016 von Rainer Keller

You know, we’ve been waiting for the show-down of the Peacocks. Today, finally, two of the males were presenting their costumes 🙂 However, the cat was not impressed.  

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Weather Now!

Publiziert am 12. Juni 2016 von Rainer Keller

Internet is such a beautiful thing. But it (thankfully) cannot change the weather 🙂 Some two weeks ago, before Elke came, it got cold, but didn’t rain… Then when they arrived, it got hot — actually very hot — again. … Weiterlesen →

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Comrades Marathon

Publiziert am 31. Mai 2016 von Rainer Keller

Having really sore muscles from climbing Table Mountain. Esp. when descending the stairs. Now I just learned that a colleague of mine in the Dept. of Mechanics ran the Comrades Marathon this very week-end, which is 89,13km! He even did … Weiterlesen →

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