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Random thoughts and content

Welcome to ruttkow.ski

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I love to teach about technology and tech products. But not in the common way of unboxing, reviewing and just re-iterating the specs. I really want to show how to use tech products and technology. To really benefit from it.

10 ideas for Bitpanda

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After reading “Skip the Line” by James Altucher I’ve tried out some of his techniques and one stuck with me (although I don‘t practice it that regularly).

It‘s to write down a list of 10 ideas on any given topic in order to train your creative muscle. I keep most of them to myself but some lists I chose to share – who knows who might read them. So without any further ado, I present you my 10 ideas for BitPanda.

The future of crypto

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Crypto currencies don’t deserve to be called a investment. There — I said it.

I’m sick of looking at charts, reading about median levels and „when moon“-tweets. I think cryptocurrencies are not worthy of being called an serious investment. At least not yet. From governments banning technolgies to quantum computing being able to crack immutability in a matter of seconds — there are a lot of factors in play which can destroy the entire ecosystem and every project in it with a fingersnap.

And because all of those factors as well as not too much adoption there’s a high volatility resulting in a high risk.

Investing — at least in my jargon — means having some sort of reliability or predictability. But the sheer amount and variety of risks is too high for me to go all in and view cryptocurrencies as a serious form of investement.

Don’t get me wrong, there are definitely many winners who took the risk, put money on the table and made a profit.

But it was a gamble after all. And for everyone trying to predict the market while drawing a fu*king dinosaur on top of chart lines..

Really?

Securing sudo and su with Google authenticator

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Passwords suck. That’s why it’s usually preferred to access systems with private / public key authentication. Especially popular with ssh connections.

Nonetheless — even a private key can get compromised. It lives — most of the times — on your local machine and therefore can be exposed to other security threats like malware etc. So let’s assume at some point our keys get compromised and an attacker is able to log in with the key to one of our servers.

Most of the times this would go unnoticed (adding a simple, yet effective monitoring solution is another article ;) ) so we have to make sure that if that happens an attacker can only do so much.

Having a good security concept in regards of user and group management is critical. On my systems, root login is prohibited and I solely work with my personal user and sudo commands. That being the main gateway into my systems I want to lock down sudo authentication and the ability to use the su command even more.

NFTs in Cardano

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NFTs in Cardano — an Etherum alternative already?

NFTs are currently the hype if you float around the cardano universe. With the recent launch of SpaceBudz and CardanoBits many more are…