Pinboard: public bookmarks for Finkregh

Working with timezones | David Turner says…

I do enjoy thinking about some of the strange things that can happen with time and timezones and it can be amusing, and occasionally useful, to read some lists of counterexamples to reasonable-sounding statements about time, but it’s hard to actually get stuff done with this information alone. All those counterexamples might leave you thinking that dealing with timezones is basically impossible to get right, whereas in fact it’s not that difficult once you draw the right pictures. I ...

programming timezone
4 days ago

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The Complete Illustrated Flexbox Tutorial – freeCodeCamp

If you wish to support my work, CSS Visual Dictionary is my book. All diagrams in this tutorial were taken directly from the manuscript! When I started to learn Flexbox, I wanted to see everything it…

layout guide flexbox css webdesign
17 days ago

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Deploying Vms On Kubernetes Glusterfs Kubevirt

Kubernetes is traditionally used to deploy and manage containerized applications. Did you know Kubernetes can also be used to deploy and manage virtual machines? This guide will walk you through installing a Kubernetes environment backed by GlusterFS for storage and the KubeVirt add-on to enable deployment and management of VMs.

kubernetes glusterfs kubevirt
17 days ago

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RPM SPEC pre/post/preun/postun argument values | Me in IT

RPM has 4 parts where (shell) scripts can be used:

%pre - Executed before installation.
%preun - Executed before un-installation.
%post - Executed after installation.
%postun - Executed after un-installation.
In all these parts or sections the variable "$1" can be checked to see what's being done:

Initial installation
Upgrade
Un-installation
This table show the values of "$1" per section related to the action:
[...]

rpm packaging script
11 weeks ago

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Let's talk about packages

Recently the Python community got to celebrate the triumphant launch of the new Python Package Index. It’s been a long time coming, and the folks who made it happen all deserve a round of applause.

PyPI is an incredibly important piece of infrastructure for the Python community, and if you use Python you probably use PyPI, directly or indirectly, on a daily basis, and many different sites, services, and companies rely heavily on it.

But: if you rely on PyPI, how often do you think about that reliance? What would you do if an incompatible version of one of your dependencies, or one of your dependencies’ dependencies, suddenly appeared? What if one of them disappeared? Would your applications or your deployments break? What would you do if PyPI had extended downtime? Would you still be able to deploy your applications? What if PyPI got hacked? If someone replaced one or more packages with malicious versions, would you be safe, or would you install the malicious packages and end up running them on your servers?

The people who run PyPI are smart and conscientious and do what they can to keep it running 24/7 and not hacked, but these are still serious questions you should be thinking about. The people who run PyPI certainly are thinking about some of the scarier cases, and working on ways to make them less scary, but there are also things you can do.

So let’s talk a bit about that.

deployment python packaging
may 2018

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A Homomorphic Encryption Illustrated Primer

Homomorphic encryption schemes provide an amazing capability - to be able to perform calculations on data without knowing what the data is. This lets you work out the answer to questions while keeping potentially sensitive source data private.
[...]

encryption
may 2018

copy to mine