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Cake day: June 20th, 2023

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  • 👋 right on! I actually also have used containers as a key to my security layout before, but yeah you miss out on all the benefits of portage.

    I was doing something crazy and actually running Gentoo inside each one! It was very difficult to stay up-to-date. But I basically had my host as barebones as possible and used LibVirt containers for everything, attempting to make a few templates that I could keep updated and base other VMs on. I was able to keep this up for about two years then I had to relax (was my main PC). But it was really secure, and it does work.

    The benefit of encapsulation is that you have a lot of freedom inside each container, like install a different distro if you need to. Also as long as they are isolated you don’t need to worry as much about their individual security. But it’s still good to. I ran SELinux on the host and non-SELinux (but hardened) in the guests.

    SELinux has a lot of advantages over users/groups, but I think the latter can be just as secure if you know what you’re doing. For example with SELinux you can prevent certain applications from accessing the network, or restrict access to certain ports, etc. It’s also useful for desktop environments where a lot of GUI apps run under one user- e.g. neither my main user nor any other program can access my keepassxc directory, only the keepassxc process (and root) can (even though the application is running under my main user). You can also restrict root quite a bit, especially if you compile in the option to prevent disabling SELinux at boot (I need to recompile my kernel to disable it).

    But again while it is fun to learn, it is quite a pain and I’ve relaxed the setup on my new computer to use a different user for everything (including gui apps), which I think is secure enough for me. But this style relies on my ability to adhere to it, whereas with SELinux you can set it up to where you’re forced to


  • Like others have mentioned, SELinux could be a great addition. It can be a massive pain, but it’s really effective at locking things down (if configured properly).

    However, the difficulty will depend on the distro. I use it with Gentoo, which has plenty of support/docs for it and provides policies for many packages. Although (when running strict policy types) I usually end up needing to adjust them or write my own.

    Obviously Red Hat would be another good choice, but I haven’t tried it. Fedora also has good support, but I’ve only ever used the OOTB targeted policies.

    That said, I’ve started relying on users/groups more often lately, since it really gets in the way of everything.


  • ctr1@fl0w.cctoLinux@lemmy.mlHow to quit VIM?
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    10 days ago

    I alternate between helix and vim depending on the task, and their key bindings are kind of opposite from each other in a lot of ways. I’ve found that switching back and forth has kept me on my toes a bit and I don’t feel as locked in to one editor as I did with vim before trying helix.

    So I’m now stuck with my customized neovim, devoid of any hope of abandoning this strange addiction.

    I would also try getting used to the defaults or a minimal config, which is also a good way to feel at home in the editor regardless of the system




  • ctr1@fl0w.cctoLinux@lemmy.mlIs anyone using awk?
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    8 months ago

    Yes! Awk is great, I use it all the time for text processing problems that are beyond the scope of normal filters but aren’t worth writing a whole program for. It’s pretty versatile, and you can split expressions up and chain them together when they get too complicated. Try piping the output into sh sometime. It can be messy though and my awk programs tend to be write-only





  • ctr1@fl0w.cctoProgramming@programming.dev*Permanently Deleted*
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    10 months ago

    I usually use Awk to do the heavy lifting within my Bash scripts (e.g. arg parsing, filtering, stream transformation), or I’ll embed a Node.JS script for anything more advanced. In some cases, I’ll use eval to process generated bash syntax, or I’ll pipe into sh (which can be a good way to set up multiprocessing). I’ve also wanted to try zx, but I generally just stick to inlining since it saves a dependency.



  • If you’re willing to spend the time to learn how to write custom policies, SELinux can be used for this, to some extent. It’s highly customizable and can sandbox your apps, but the process of doing so is quite complicated. I wrote a small guide on custom policy management on Gentoo in another comment if you’re interested.

    There’s also apparently a “sandbox” feature, but I don’t know much about it. I just write my own policies and make them as strict as possible.

    As an example, my web browser can’t access my home directory or anything except its own directories, and nobody (including my own user), except root and a few select processes (gpg, gpg-agent, git, pass) can access my gnupg directory.

    This only covers security/permissions, and doesn’t include many of the other benefits of containerization or isolation. You could also try KVM with libvirt and Gentoo VMs; that works pretty well (despite update times) and I did that for a while with some success.





  • ctr1@fl0w.cctoLinux@lemmy.mlIs gentoo a good choice?
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    1 year ago

    Yes! Depending on how much time you want to spend figuring things out… there is a learning curve, but the documentation is quite extensive. And you do learn a lot about Linux by diving in. The compile times aren’t really an issue today if you have decent hardware- I run it at home and on all of my servers (some of them not very powerful). You can do other things while it’s compiling.

    It’s great if you want to customize everything and learn how your system works, or are interested in optimizing everything for your specific CPU architecture. There are a few pitfalls (especially when learning), but I’ve generally been able to learn how to fix any issues as they arise.

    Also, the package availability is great. If you can’t find something in the gentoo repository or in an overlay, you can usually find its dependencies and build it yourself.



  • The difference is that your ISP doesn’t know where your packets are headed, and the destination doesn’t know where your packets came from. The ISP sees you connect to the entrance node and the destination sees you connect from the exit node, and it’s very difficult for anyone to trace the connection back to you (unless they own both the entrance and exit and use traffic coorelation or some other exploit/fingerprint). Regardless, both parties are generally able to tell that you are using TOR if they reference lists of known entrance/exit nodes. Also the anti-fingerprinting measures taken by TB are a bit more strict than other privacy-focused browsers



  • An extension would be cool! I’m currently trying to do something similar, in some sense; I’ve patched my instance to filter out DB results from public queries so that only my posts and comments are visible (unless I am logged in).

    The only thing I’m not sure about yet is if it’s possible - if I create a Post on an instance that’s not my home, who is hosting the data? Do I only send ActivityPub Create Post with the data and the instance then saves it, or do I create the post on my own instance, send an ID, and if someone requests the Post data on the instance I posted to, it will be requested from mine?

    I believe it might be possible, but I’m not sure. It seems that the protocol itself is mostly geared for synchronizing data and distributing updates. From my limited understanding, servers follow users or communities on other servers, which inform those servers that updates should be sent to the requesting inbox. These updates are then used to build up a local copy of the remote page. In the case of a remote community, users interact with their local copy and notify the remote community of those changes.

    For example, I am viewing a local copy of this post that I received from lemmy.ml, and my reply to your comment will be stored locally. My server will notify lemmy.ml of this comment (including its contents), and lemmy.ml will notify my inbox if anyone interacts with it (because I am a follower).

    It seems that at least some of this syncing might not be necessary… a lightweight frontend could rely on the API of each site it connects with to build up the activities it sends. However, this would probably cause some unnecessary traffic, as such a follower would both receive updates and query the API. Also it would probably break some things, such as ap_id (see the multicolored fedilink icon, which points the original copy of the content on my instance).


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