Personal DNS server
Linux
After personal Email server the next thing to setup is a Domain Name Server (DNS) server for costan․ro domain with DNSSEC, TLS and everything in between.
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"The noblest pleasure is the joy of understanding" - Leonardo Da Vinci
"If you can't explain it simply, you don't understand it well enough" - Albert Einstein
Annapurna circuit - the plan
Trekking
Here is the initial plan for Annapurna Circuit, segment by segment with highlights, notes and everything that is interesting along the way.
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BLS signature scheme
Cryptography
From a high level perspective this is how BLS (also known as Boneh–Lynn–Shacham) signature scheme works.
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Reminiscences of ... a loss
Trading
Never ask a trader how much he makes but how much he lost… here is a story…
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Personal email server
Linux
Given that GMail with cease to provide free hosting service for custom domains I've decided to deploy a fully featured personal email server and migrate everything to my Arch Linux box.
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SSH keys on USB
Linux
This is how I keep my SSH key(s) secure and offline, stored on encrypted USB flash-drive.
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Completion system
Emacs
Completion system … vertico, consult, posframe, orderless, marginalia, projectile … corfu, cape, eglot, kind-icon … Ohhh my!
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Chess vs. trading
Trading
Just for fun (and maybe some profit) let's do a comparison (a bit far fetched) between chess and trading.
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From HDD to SSD w/ EFI boot
Linux
Oh, Oh! Santa is back in town and I bought myself a small gift to upgrade my Arch Linux garage server from HDD to SSD, here is the step-by-step how to…
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Segwit transaction by hand
Bitcoin
Lets hand craft a SegWit transaction using only built-in Python3 functions for hex/bytes manipulation and Sagemath for elliptic curves arithmetic.
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