Semi-technical thoughts

It's starting to happen more and more often to me. I'm trying to use some service and all of a sudden I see an error page, sometimes a custom one but more often generated by cloudflare or a similar service, with error message effectively saying that IP addresses from Russia are banned on the service. And what is even more interesting, most of this services don't have any particular policy reasons not to allow Russian users, it's not not like they are publishing prescribed materials or doing anything interesting whatsoever. A payment processor, a popular online course provider, some random forums and information sites, one site with educational videos that I like (that one is especially funny because I'm banned from the subscription page and so can't pay them but their cdn does't care and I can actually download any video I want). But why does it happen? Is there some recommendation in some popular security guideline "block Russia, Cambodia, and Afghan...

If you own a Bluetooth A2DP headset and any kind of personal computer, good chance is you tried connecting them together. Isn't it nice to watch movies and listen to music free from cluttering wires? Well, good chance is you hated that experience and if that was the reason for buying the headset, you might've even considered throwing it away (or using it only with your phone). Why do they suck so much? Everything points to the fact that it's not a hardware problem. The same headset most likely will work flawlessly paired with an android device or even the same computer under a different operating system (windows users report huge difference between, like, 8.0 and 8.1, and not in favor of the latter, surprisingly, I think only mac users report good stuff about their macbooks and beats although I didn't try it myself so they might all be faking it :) ). And most likely it's not even the drivers or other low-level stuff, android and desktop linux has mostly the same ...

Sorry, it's not a complete instruction, just a thought. It occurred to me (some time ago) that Python's virtualenv is, essentially, a simplified version of system "prefix", it has bin, lib, include, and can have more stuff when needed. If you're willing to experiment (you'll probably have to set a few additional environment variables and/or build flags but that's no big deal), you can install various other tools there up until you have a complete system with its own compiler and complete set of libraries although it's much simpler to keep using system compiler and libraries only complimenting them when needed. Granted, prefixes are nothing new, people were using /opt (and their home directory) this way since the beginning of time. But with little help of virtualenv-wrapper or pyenv you can easily switch between them and isolate environments better. Binaries and stuff installed in virtualenv would override system defaults but only when venv is activat...

Generation 2 of Lenovo ThinkPad X1 Yoga was announced at this year's CES with both small and big improvements. They finally added Thunderbolt 3 ports with USB-PD charging support, which makes it slightly better deal than Yoga 910 (which is still visually more pleasing to me but no thunderbolt = muh). Anyway, the best part is it's virtually the only laptop with OLED display and I love OLED. I almost immediately decided that I'm gonna buy it eventually (not right now unless something happens, my Yoga 900 is not yet outdated, probably next year or whenever they make Gen 3) provided there are no deal breakers. Then I saw its keyboard: Apart from weird Home/End position (why not make it Fn-PgUp/Fn-PgDn like everyone does? F1-F12 keys are pretty small as a result. But maybe they could be used for some hotkeys with a little xmodmap magic?..) the obvious elephant in the room is swapped Fn-Ctrl keys: seriously, who does that? I even wrote it off as a dealbreaking thing and forgo...

More than once I've written about stuff made by Big Brand manufacturers so I decided to balance things out by writing about a mostly-unknown but good things. In short, if you need something small like HDD enclosure or some cable or USB hub or a dongle of some kind, check if ORICO makes it and chances are you won't be disappointed. It's usually slightly more expensive than low-end stuff from aliexpress but, in my opinion, it's usually worth it. Disclaimer. This post is a shameless promotion of their brand although, unfortunately, nobody paid me for it or even sent me any free stuff. Guys from ORICO and not, if you read this, I'll gladly review whatever free goodies you send me :) I only do honest reviews so better make sure to send the good stuff. At this point I own a USB hub, three different 2.5" HDD enclosures, and a precision screwdriver set from them. And probably something else I don't remember. Here are the pics: USB hub in its natural habitat...

While we are on the topic of sockets and chargers. UK three-prong plug (type G) allows you to put heavier things into the socket and they will sit there securely. Also it's rated 250V/13A allowing more powerful appliances and probably safer than any other plug type  (not mentioned there that almost every socket has an off switch, as an additional safety feature, apart from all the shutters, insulation, and built-in fuses). (Photo from Wikimedia Commons) If the world ever comes to a standard AC plug type, I hope it will be either that or at least something as robust and safe. And, let's face it, the only two alternatives (EU and US plugs) are not that universal, there are dozens of variations (where to put the ground prong, how to ensure polarity, even how big the prongs themselves must be) that makes either harder to adopt as a single universal standard.

Adapter I had for charging my laptop broke yesterday. Now I need to give you a bit of a background to explain what kind of adapter that was. So, Lenovo produces lots of different laptops. And, just like all other manufacturers, they have lots of different charger connectors. With Yoga series, it was always some weird variation of USB, not a (more typical until recently) round connector. In particular, for Yoga 3 and 4 it looks like this: (Photo from Aliexpress) It's unclear why apart from making people buy their stupid chargers. You hardly can use the port for anything else when not charging (it's not even 3.0). And I mean stupid, just look at this: (Photo from Aliexpress) How can even call it a "travel" adapter is beyond understanding. If you actually travel, you have either to buy a new one for every socket type, or use a socket adapter which (considering most wall sockets are located in walls) will make this massive charger fall out every few minute...

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 So, I've generated a new GPG keypair. It has a set of subkeys (one per usage), which, theoretically, should make it all more convenient and secure. Also it uses currently-recommended algorithms (4096-bit key RSA and SHA512) and was generated using my new hardware entropy source which was the main reason for this change. The old key will be expired in a couple months unless I revoke it as superseded first. There is no reason to believe it was compromised or anything. New key's fingerprint is F819 3F12 6021 6B7D D53B 959F E273 25A3 92D7 0FFB for copying and pasting: 0xF8193F1260216B7DD53B959FE27325A392D70FFB ), long key id is 0xE27325A392D70FFB. Please import my new public key from the keyserver you prefer or using PKA dns records. You can use this command on most platforms: gpg --search-keys 0xE27325A392D70FFB (Unfortunately, GnuPG or/and keyservers don't really support search by fingerprint or showing it in the imp...