If you’re trying to learn Docker you will first have to master its various terminal commands. This guide aims to help you get started with basic docker commands.

systemd has become a mainstay for the Linux world, but one of the things that still seems to stick around is cron jobs. It’s understandable, as cron is a tool that we have been using for a long time. Change is hard, but I think systemd Timers make the change well worth it. Here are a few reasons why…

A large majority of computer systems have some state and are likely to depend on a storage system. My knowledge on databases accumulated over time, but along the way our design mistakes caused data loss and outages. In data-heavy systems, databases are at the core of system design goals and tradeoffs. Even though it is impossible to ignore how databases work, the problems that application developers foresee and experience will often be just the tip of the iceberg. In this series, I’m sharing a few insights I specifically found useful for developers who are not specialized in this domain.

On any given day, we handle around 15% of daily retail trading volume across all stock exchanges in India. Billions of requests generated in the process are handled by a suite of systems we have built in-house. Also, we are very particular on self-hosting as many dependencies as possible, everything from CRMs to large databases, Kafka clusters, mail servers etc.

To aid these primary systems, there are a large number of ancillary workloads that run, covering everything from real-time trades, document processing, KYC, and account opening, legal and compliance, complex, large scale P&L and number crunching, and a wide range of backoffice workloads. The systems are spread across a hybrid setup; physical racks across two different data centres (where exchange leased lines terminate) and AWS. All of this means that we have a lot of dynamic workloads and dissimilar systems and environments, bare metal to Kubernetes clusters, to be monitored independently.

The first and second open source migration waves were periods of rapid expansion for companies that rose up to provide commercial assurances for Linux and the open source databases, like Red Hat, MongoDB, and Cloudera. Or platforms that made it easier to host open source workloads in a reliable, consistent, and flexible manner via the cloud, like Amazon Web Services, Google Cloud, and Microsoft Azure.

This trend will continue in the third wave of open source migration, as organizations interested in reducing cost without sacrificing development speed will look to migrate more of their applications to open source. They’ll need a new breed of vendor—akin to Red Hat or AWS—to provide the commercial assurances they need to do it safely.

I’ve been writing about running Docker on Raspberry Pi for five years now and things have got a lot easier than when I started back in the day. There’s now no need to patch the kernel, use a bespoke OS, or even build Go and Docker from scratch.

The decision in 2017 to move back to a monolith considered all the trade-offs, including being comfortable with losing the benefits of microservices. The resulting architecture, named Centrifuge, is able to handle billions of messages per day sent to dozens of public APIs. There is now a single code repository, and all destination workers use the same version of the shared library. The larger worker is better able to handle spikes in load. Adding new destinations no longer adds operational overhead, and deployments only take minutes. Most important for the business, they were able to start building new products again. The team felt all these benefits were worth the reduced modularity, environmental isolation, and visibility that came for free with microservices.

In this letter, the minister agrees to the principle of Free Software by default ("Open Source by default") for procurement, which can be considered a parallel to the 'comply or explain' policy that is already in effect for the adoption of open standards. The minister also agrees to the government actively developing and publishing Free Software.

"Protesting is a non-essential activity." That's what the police said.

Humans are complex beings, and we are capable of holding more than two thoughts in our minds at once. That's how I'm able to recognize that these protestors were, at best, the unwitting patsies of a bigoted death cult — while also acknowledging that a police department deeming protest as "non-essential" is, at best, dumb, and at worst, utterly horrifying.

What Should the US Federal Government and the States Do to Fight the Coronavirus

Die Novelle soll am Dienstag im Nationalrat beschlossen werden. Die Änderung des Epidemiegesetzes, die ohne Ankündigung im Gesundheitsausschuss von ÖVP und Grünen beschlossen wurde, schlug zuletzt hohen Wellen. Die Opposition kritisierte, dass die Bestimmung, die künftig erlaubt, Veranstaltungen auf „bestimmte Personengruppen“ zu beschränken, bedeute: Andere Personengruppen, etwa CoV-Risikogruppen und Personen, die keine App installiert haben, werden ausgeschlossen.

security.tls.version.min specifies the minimum required protocol version (thus, the lowest version allowed to fall back to when higher versions are not available).
security.tls.version.max specifies the maximum supported protocol version (thus, the highest version to initiate a connection with before falling back to lower versions).

0
SSL 3.0 is the minimum required / maximum supported encryption protocol. (Default up to FF/TB 33.0 and SM 2.30 for minimum version.)

1
TLS 1.0 is the minimum required / maximum supported encryption protocol. (This is the current default for the minimum required version.)

2
TLS 1.1 is the minimum required / maximum supported encryption protocol.

3
TLS 1.2 is the minimum required / maximum supported encryption protocol. (This is the current default for the maximum supported version.)

“Better understanding of who is responsible for transmission and when during the disease progression is a really important piece of the jigsaw and we still don’t have any real insight,” said Professor Jonathan Ball, a virologist at Nottingham University.

The Sunday Times investigation into the government's catastrophic handling of the coronavirus is one of the most important things you've read.

It's behind a paywall, so here's a thread with the key points. Make sure everyone sees it.

Ich möchte lernen wie man Behelfsmasken näht

1. Der richtige Stoff

Dein Stoff ist geeignet, wenn er folgende Anforderungen erfüllt

100% Baumwolle
muss und bei 60°-90°C waschbar sein
allergikerfreundlich
fusselfrei
nicht ausleiernd

Dünnerer Stoff ist besser als dicker. Gut bewährt haben sich: Tischdecken, Stofftaschentücher, T-Shirts und manche Vorhangstoffe (nicht zu dick). Auch Jeans kann man verwenden. Weniger gut geeignet: Bettlaken/Jersey.

Achtung: Die Filterwirkung leistet der eingesetzte Filter, nicht der Baumwollstoff!

Among my academic colleagues and friends, I have observed a common response to the continuing Covid-19 crisis. They are fighting valiantly for a sense of normalcy — hustling to move courses online, maintaining strict writing schedules, creating Montessori schools at their kitchen tables. They hope to buckle down for a short stint until things get back to normal. I wish anyone who pursues that path the very best of luck and health.

Yet as someone who has experience with crises around the world, what I see behind this scramble for productivity is a perilous assumption. The answer to the question everyone is asking — "When will this be over?" — is simple and obvious, yet terribly hard to accept. The answer is never.

Dabei brauchte Österreich dringend ernsthafte Diskussionen. Die Maßnahmen haben gewirkt, das stimmt. Aber von den angedrohten Horrorbildern war das Gesundheitssystem zu jedem Zeitpunkt so weit entfernt, dass weniger rigide Einschränkungen sehr wahrscheinlich auch gereicht hätten. Nötig wäre jetzt ein Szenario, das über Verbote und Verzichtsappelle hinausgeht. Österreich wird dieses Virus nicht im Alleingang ausmerzen, so fügsam und brav können die Bürger gar nicht sein. Die „neue Normalität“, von der Sebastian Kurz gerne spricht, sollte nicht in erster Linie darin bestehen, dass wir um kleinste Erleichterungen betteln müssen.

Angesichts der zunehmenden Kritik am Agieren der Bundesregierung in der Corona-Krise verteidigte Nationalratspräsident Wolfgang Sobotka in der ORF-Pressestunde das Vorgehen der Entscheidungsträger.

No matter how much we want to return to ‘normal’, we must be wary of additional for-profit use of our data

Die Regierung hat mit ihren Aktionen nun die Büchse der Pandora geöffnet.

Sie hat die Rechtsstaatlichkeit über eine Grenze manövriert, deren Überquerung Freiheitsbeschränkungen, Polizeiwillkür, Bürgerbespitzelungen und Rechtsbeugung möglich macht.
...
Wir müssen fürchten, dass wir unser vergleichsweise freies, durch Bürgerrechte abgesichertes und von Behörden nur ansatzweise kontrollierbares Leben in Österreich, wie es früher war, nicht mehr zurückbekommen werden. Das sind keine schönen Aussichten.