Category: Documentations
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After 44 years, there’s finally a better way to find approximate solutions to the notoriously difficult traveling salesperson problem.
Source: Computer Scientists Break Traveling Salesperson Record | Quanta Magazine
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NTRU – Software
According to Wikipedia
NTRU is an open-source public-key cryptosystem that uses lattice-based cryptography to encrypt and decrypt data.
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Unlike other popular public-key cryptosystems, it is resistant to attacks using Shor’s algorithm.
NTRUEncrypt was patented, but it was placed in the public domain in 2017. NTRUSign is patented, but it can be used by software under the GPL.[1][2]
So this quantum resistant crypto algorithim is either public domain – which is good – or it’s signing version is patented but usable in GPL-licensed software. I must
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No Grid Survival Projects
70 ingenious DIY projects that can help you protect your family during hard times – Clear, step-by-step instructions, pictures, and sketches – Access to Videos for each project
I may buy this book
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Documentations, Tricks
Increase “Open Files Limit”. Solution for “Too many open files (24)”
Increase “Open Files Limit”. Solution for “Too many open files (24)”
Tricks
One liner, static web-server
willurd on web-servers.md show quite a few one-liner (or mostly) commands that will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. I think I will use only the Python 3.x version which is as simple as
Documentations
I colori dei dischi
Cosa significano i codici di colore dei dischi fissi? È una pratica usata da Western Digital per indicare la destinazione d’uso prevista per un disco. Da What do different WD Hard Drive colors mean? WD Blue HDD: è un supporto di archiviazione generico, affidabile e a basso consumo. WD Red HDD: è prodotto per sistemi…
Documentations, Fedora - RedHat
As I wished to add a little NextCloud installation to my small corporate server I used its web installer that quaralled that PHP 7.2 is too old. I was used to Debian way of handling multiple versions of a package (having the major version in the package name). These notes on server-world.info reminded me dnf…
Documentations
Data rotting on magnetic hard drives
According to https://mastodon.uno/@octo/108051239339031165 …it would be good practice to rewrite the data on HDDs every few years because magnetism tends to weaken over time… Flash memories (SSD, microSD…), on the other hand, simply need to be powered up from time to time, because they store bits as electrical charges in cells that act more or…