Sourdough - Day 4

After another 24h both glasses are already raising. The sourdough started is now active and can be used for baking. I'll still feed them and let them stand for another day, but in principle this is how it should look and what you need to do.

Finished sourdough in jam glasses. Left: Rye based, Right: Wheat/Spelt based

Sourdough in about 4-5 days from scratch, using nothing but flour and water. Nature provides really everything you can wish for 🙂

Sourdough - day 3

After another day, the sourdough should be already pretty active. A slight soury smell and visible bubbles are arising. This shows us, the bacteria are active and doing exactly what they are supposed to be doing.

Bubbles and a mild sour smell. That's how it should be!

Until now I made a very generic sourdough. Now it's time for the dough to specialise. With specilise I mean, that we create trunks for the different flour types we intent to use. I mostly bake with wheat/spelt and with rye, so I'm gonna create two types of sourdough.

Ultimately I want to have two different jam glasses in the fridge, one for wheat/spelt and one for rye. In general sourdough likes it to always have the same kind of flour and because wheat, spelt and rye are different grains it's recommended to have different sourdough for each of them. I mix spelt and wheat together, because until now I had good results with this combination.

So, I take now two jam glasses, fill them 1/4 with flour and add 4 tablespoons of our sourdough to each of them. Then I mix the contents and add warm water until we reach a very liquid, but sill doughy consistence. This we now let raise for another day.

Left is the rye-based sourdough, right is the wheat/spelt based sourdough. They are now going to raise for 12h

In about 12h we're probably have to feed them again. Now the activity of the sourdough should be already pretty good.

Sourdough - day 2

Day two of making sourdough from scratch. The dough starts to have some larger bubbles and already smells mildly sour. Looks good so far!

This is how your sourdough should look after 1-2 days. Some larger bubbles form as result of the process the bacteria are doing in the dough

I removed more than half of the dough and fed the remains with fresh flour and water. After re-feeding all of the bubbles are gone. After some minutes some small new bubbles start to form. This is a good sign for activity and shows us, that we are on the right way. Actually a bit faster than I though 🙂

Looks like we're soon ready to make new bread again 🙂

Sourdough - Day 1

Just a tiny update on the sourdough process. After 1 day some small bubbles start to form. I've fed the dough using again 50g flour and 50g water. On day 1 I don't remove old dough, as I think the number of absolute bacteria is still low and needs to be increased first.

Developing sourdough, already has some small bubbles after 1 day

We're having about 19 degrees here in the house. It's not optimal but it seems to work. Could be that it's slowed down a little bit because of the temperature. Anyways, the bacteria are pretty resilient, so no need to worry. Might just take a day longer 😉

Sourdough starter

Sourdough from Scratch

I'm starting a new sourdough culture from scratch. All you need is flour, water a nice and warm spot and some time.


  • 50g wholemeal flour
  • 50g universal flour
  • ca. 50-100g water

Mix everything nicely together and put to rest for a day. The bacteria prefer temperature between 20 and 25 degrees. Low temperature encourage lactate-bacteria growth (sour taste), higher temperature yeast bacteria. In the end you want to have both, so keeping the temperature in this range is recommended.

Also making sourdough and bread from it is one of the crucial skills everyone should know for the unavoidable upcoming zombie apocalypse 😉

Windows 10 Clock in UTC

If you are running Windows and Linux in dual boot, you will soon find out, that the clocks are not matching. Most probable the reason is that Windows by default expects the computer time to be set to local time, while Linux assumes it to be UTC.

I consider the approach of Linux the better one: The BIOS/UEFI system time is there set to a global harmonised standard, UTC. The operating system then translates this to the local time. This means you can install as many operating systems in parallel without interference of them with the system time - just immagine if you have for example, Windows, FreeBSD and two Linux distributions on your computer and every one of them wants to account for daylight saving time .... When setting the system clock to UTC, this problem will never arise.

Setting Windows to use UTC as system time

Registry magic! Create a new registry key named RealTimeIsUniversal.reg with the following contents.

Alternatively you can create a QWORD (or DWORD for 32-bit Windows) with the value "1" in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation\RealTimeIsUniversal

Then reboot Windows and set the time zone to UTC

If unsure, try another reboot to check if the settings persists, but that should do the job.

Bye-Bye Rescue Service

I'm sad.

On Saturday, 12.10.2019 I had to sign my resignation from the White Cross. After about 13 years of service and many friendships this was an incredible hard step to make. Indeed, up to now this was probably the hardest signature I ever had to do (And I'm still sorry that I had to do this Luke, I really am!)

When you are moving to a new country, you got to cut down some of your roots. It hurts, and I keep on repeating a good old saying

If you want something new, you have to stop doing something old.

Peter F. Drucker

I'm now heading to my next big thing: moving to another country. And I'm sure, there will be new opportunities to contribute and socialize. Fire brigades are all over the places and the Red Cross is also active there 🙂


... from the black magic voodoo ssh box of the tech priests ...

[Scroll down for the TL;DR section]

I'm writing this post as an ode to ProxyJump of ssh, one of the little helpers that make your day awesome.
If you are working on multiple computers in different companies/networks at some point you encounter the scenario, where you want to access a computer, that is only reachable via another computer. Let's say, you need to access your office computer names datenhalde from home, but datenhalde is only reachable via the company network.
Luckily your company provides a public ssh gateway named gateway), where you can connect from your home computer (named zuhause). On a Friday you decide that it's a day where you want to work without interrupts from home. Perhaps you just brewed a nice cup of coffee and start your work

At some point, you might find it unnecessary boring to always type in ssh gateway and then ssh datenhalde and you wonder, if there is not a more convenient way, to directly access datenhalde from zuhause via gateway, but without the fuzz of redundant ssh typing.

This is where ProxyJump comes into play. Use -J

Here ssh connects first to gateway and then to datenhalde. Awesome!

ssh config for even more convenience

Even better, you can put the ProxyJump into your ssh config, so every time you access a host, if first jumps to the given gateway host and then to the destination. Too complicated formulated? Just look at the following example

Now, if you connect to datenhalde via ssh, it automatically and transparently first jumps to gateway and then to datenhalte. This configuration then applies to all protocols that are building atop ssh, like scp, rsync or libvirt.


Want to connect to your working computer datenhalde via a ssh gateway in one single command?

Want to configure your ssh-configuration to always jump to gateway before connecting to datenhalde?

Then your ssh connections will transparently always jump over gateway

ProxyJump for the glory!

ProxyJump is a tool for the tech priests, and it's imperative that every adept of the Adeptus Mechanicus shall be able to handle it.
... in the (unlikely?) case in Warhammer 40k they also use ssh ...