DefederateLemmyMl

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Joined 1 year ago
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Cake day: August 8th, 2023

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  • A core memory of mine is getting flung off of one of these things because of the centrifugal force, falling on my back, and being unable to breathe for like 20-30 seconds … until I screamed at the top of my lungs, and things slowly returned to normal, while the teacher just went: oh you’re fine, don’t be a baby. I was 6.


  • In Unix/Linux, a removed file only disappears when the last file descriptor to it is gone. As long as the file /usr/bin/rm is still opened by a process (and it is, because it is running) it will not actually be deleted from disk from the perspective of that process.

    This also why removing a log file that’s actively being written to doesn’t clear up filesystem space, and why it’s more effective to truncate it instead. ( e.g. Run > /var/log/myhugeactivelogfile.log instead of rm /var/log/myhugeactivelogfile.log), or why Linux can upgrade a package that’s currently running and the running process will just keep chugging along as the old version, until restarted.

    Sometimes you can even use this to recover an accidentally deleted file, if it’s still held open in a process. You can go to /proc/$PID/fd, where $PID is the process ID of the process holding the file open, and find all the file descriptors it has in use, and then copy the lost content from there.




  • We are talking about addresses, not counters. An inherently hierarchical one at that. If you don’t use the bits you are actually wasting them.

    Bullshit.

    I have a 64-bit computer, it can address up to 18.4 exabytes, but my computer only has 32GB, so I will never use the vast majority that address space. Am I “wasting” it?

    All the 128 bits are used in IPv6. ;)

    Yes they are all “used” but you don’t need them. We are not using 2^128 ip addresses in the world. In your own terminology: you are using 4 registers for a 2 register problem. That is much more wasteful in terms of hardware than using 40 bits to represent an ip address and wasting 24 bits.


  • you are wasting 24 bits of a 64-bit register

    You’re not “wasting” them if you just don’t need the extra bits, Are you wasting a 32-bit integer if your program only ever counts up to 1000000?

    Even so when you do start to need them, you can gradually make the other bits available in the form of more octets. Like you can just define it as a.b.c.d.e = 0.a.b.c.d.e = 0.0.a.b.c.d.e = 0.0.0.a.b.c.d.e

    Recall that IPv6 came out just a year before the Nintendo 64

    If you’re worried about wasting registers it makes even less sense to switch from a 32-bit addressing space to a 128-bit one in one go.

    Anyway, your explanation is a perfect example of “second system effect” at work. You get all caught up in the mistakes of the first system, in casu the lack of addressing bits, and then you go all out to correct those mistakes for your second system, giving it all the bits humanity could ever need before the heat death of the universe, while ignoring the real world implications of your choices. And now you are surprised that nobody wants to use your 128-bit abomination.


  • Hmm, I can’t say that I’ve ever noticed this. I have a 3950x 16-core CPU and I often do video re-encoding with ffmpeg on all cores, and occasionally compile software on all cores too. I don’t notice it in the GUI’s responsiveness at all.

    Are you absolutely sure it’s not I/O related? A compile is usually doing a lot of random IO as well. What kind of drive are you running this on? Is it the same drive as your home directory is on?

    Way back when I still had a much weaker 4-core CPU I had issues with window and mouse lagging when running certain heavy jobs as well, and it turned out that using ionice helped me a lot more than using nice.

    I also remember that fairly recently there was a KDE/plasma stutter bug due to it reading from ~/.cache constantly. Brodie Robertson talked about it: https://www.youtube.com/watch?v=sCoioLCT5_o



  • It’s when you have to set static routes and such.

    For example I have a couple of locations tied together with a Wireguard site-to-site VPN, each with several subnets. I had to write wg config files and set static routes with hardcoded subnets and IP addresses. Writing the wg config files and getting it working was already a bit daunting with IPv4, because I was also wrapping my head around wireguard concepts at the same time. It would have been so much worse to debug with IPv6 unreadable subnet names.

    Network ACLs and firewall rules are another thing where you have to work with raw IPv6 addresses. For example: let’s say you have a Samba share or proxy server that you only want to be accessible from one specific subnet, you have to use IPv6 addresses. You can’t solve that with DNS names.

    Anyway my point is: the idea that you can simply avoid IPv6’s complexity by using DNS names is just wrong.





  • I ran it perfectly on a 33MHz 486 with 4mb RAM for a long time. Even Doom II with some of its heavier maps ran fine.

    “Perfectly” would mean it ran at 35fps, the maximum framerate DOS Doom is capped at. In the standard Doom benchmark, a dx33 gets about half that: 18fps average in demo3 of the shareware version with the window size reduced 1 step. Demo3 runs on E1M7, which isn’t the heaviest map, so heavier maps would bog the dx33 down even more.

    I’m sure you found that acceptable at the time, and that you look back on it with slightly rose-tinted glasses of nostalgia, but a dx2/66 and preferably even better definitely gave you a much better experience, which was my point.


  • If anyone can enlighten me, This is pretty much why you can find DooM on almost any platform BECAUSE of its Linux code port roots?

    I mean yeah. Doom was extremely popular and had a huge cultural impact in the 90s. It was also the first game of that magnitude of which the source was freely released. So naturally people tried to port it to everything, and “but can it run Doom?” became a meme on its own.

    It also helps that the system requirements are very modest by today’s standards.


  • It ran like absolute ass on 386 hardware though, and it required at least 4MB of RAM which was also not so common for 386 computers. Source: I had a 386 at the time, couldn’t play Doom until I got a Pentium a few years later.

    Even on lower clocked 486 hardware it wasn’t that great. IIRC, it needed about a 486 DX2/66 to really start to shine.


  • How the fuck am I supposed to know that Network Manager won’t support DNS over TLS

    Read the documentation? Use google?

    The very first hit when you google “dns over tls tumbleweed” provides the answer: https://dev.to/archerallstars/using-dns-over-tls-on-opensuse-linux-in-4-easy-steps-enable-cloud-firewall-for-free-today-2job

    A more generic query “dns over tls linux” gives this, which works just the same: https://medium.com/@jawadalkassim/enable-dns-over-tls-in-linux-using-systemd-b03e44448c1c

    Both google searches return several more hits that basically say the same thing.

    Even the NetworkManager reference manual refers you to systemd-resolved as the solution: https://www.networkmanager.dev/docs/api/latest/settings-connection.html

    Key Name Value Type Description
    dns-over-tls int32 Whether DNSOverTls (dns-over-tls) is enabled for the connection. DNSOverTls is a technology which uses TLS to encrypt dns traffic. The permitted values are: “yes” (2) use DNSOverTls and disabled fallback, “opportunistic” (1) use DNSOverTls but allow fallback to unencrypted resolution, “no” (0) don’t ever use DNSOverTls. If unspecified “default” depends on the plugin used. Systemd-resolved uses global setting. This feature requires a plugin which supports DNSOverTls. Otherwise, the setting has no effect. One such plugin is dns-systemd-resolved.

    I don’t use NetworkManager, I’ve never even used Tumbleweed and I found the answer in all of 10 minutes. Of course that doesn’t help if you’re so clueless that you didn’t even know that you were using DNS-over-TLS, or that DoT is a very recent development that differs significantly from regular DNS and that it requires a DNS resolver that supports it.

    when every other operating system does?

    Like Windows 10? (Hint: it doesn’t)

    You use Arch. Mr skillful

    Who cares what I use. When I’m messing with something I don’t understand, I at least read the documentation first instead of complaining on the internet and calling the whole community toxic and, I quote, “Butthurt Linux gobblers” when you get the slightest bit of pushback.