It’s difficult to describe in one post what thousands of books have been written about in a thousand pages, but today we’ll try to quickly review the basics of how hosts communicate on a network. First, let’s talk about the OSI and TCP/IP models, then about packet structure and connection establishment, and finally, we’ll look… Read More »
Even though the changes were announced in emails from Arch Linux, for some reason, many people have had problems with the latest update: in the Arch Linux subreddits on Reddit, people are complaining like “Everything is broken, what should I do now?” Let’s see how to complete the upgrade and what exactly has changed. The… Read More »
It’s not often, but sometimes I need to boot the system from a USB and rebuild initramfs-linux.img. This post is more of a quick note to myself on how, what, and where to mount on my laptop to run mkinitcpio, as I have LVM partitions, separate disk partitions for /boot, and swap. iwctl and WiFi… Read More »
I’ve already written a little about Pritunl before – Pritunl: Running a VPN in Kubernetes. Let’s return to this topic again, but this time on EC2 in AWS, without Kubernetes. So, what we need to do is to run some kind of VPN service for the project to have access to Kubernetes APIs/Kubernetes WorkerNodes/AWS RDS/etc… Read More »
After the latest Arch Linux upgrade, Yay reported the following error: yay: error while loading shared libraries: libalpm.so.13: cannot open shared object file: No such file or directory First, let’s check if we have the libalpm library file, and which version: $ sudo find / -type f -name “*.so*” | grep libalpm /usr/lib/libalpm.so.14.0.0 So, we… Read More »
I updated my Arch Linux yesterday, and for the first time in 9 years of using this system, I encountered an error when after a reboot the system could not mount a disk: ERROR: device UUID not found. mount: /new_root: can’t find UUID. ERROR: Failed to mount UUID on real root. You are now being… Read More »
This time it became interesting to me – is it possible to somehow save the charge of the laptop battery? Not to say that it discharges quickly, it is enough for 5-6 hours of work, but it will not be too much, especially with the current power outages in Ukraine. Found several utilities, and will… Read More »
During system upgrade with pacman -Syu, I got internet disruption, and on the next upgrade I got the error from pacman. It sounds like “HTTP server doesn’t seem to support byte ranges. Cannot resume“: [simterm] … ==> Retrieving sources… -> Downloading clightd-5.6.tar.gz… ** Resuming transfer from byte position 12288 % Total % Received % Xferd… Read More »
During an SSH connection, I started getting the “Too many authentication failures” error message from a remote host. The error, and its cause Actually, the root cause is simple: during establishing a new SSH connection, the local ssh-client first tries to use keys, that are loaded by the local ssh-agent, and only after that will… Read More »
There are a lot of utilities to create a Git animation for Linux, but I like the peek. Besides the Gif, also can create files in the MP4, WebM, APNG formats. On the Arch Linux can be installed from the AUR: [simterm] $ sudo pacman -S peek [/simterm] Run it: [simterm] $ peek [/simterm] The… Read More »