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Tux Machines
Posted by Roy Schestowitz on Sep 11, 2022
> The latest Raspberry Pi OS release saw a beta of Network Manager, a tool new to the Raspberry Pi that replaces dhcpcd as a means to manage networking on the Pi. This new tool provides us with a simple, GUI based means to configure a spare Raspberry Pi as a wireless access point. If you need to extend a networking setup, add Wi-Fi to those hard to reach places, then this is for you.
> We’re going to go through the steps necessary to configure a Raspberry Pi as a wireless access point, and have the access point start whenever the Pi is booted. Best of all, this project will work with the Raspberry Pi 3B, 3B+ and the latest Raspberry Pi 4.
> That said, at the time in the mid noughties this greytrapping setup was announced, we had been battling scammy spam email and malicious software that also abused email to spread for some years, and we were eagerly looking for new ways to combat the spam problem which tended to eat into time and resources we would rather have used on other things entirely.
> With that backdrop, collecting made up or generated, invalid email addresses in our home domains from various logs as traps for spammers seemed like an excellent joke and a fun way to strike back at the undesirables who did their damnedest to flood our users' mailboxes.
> When I migrated my web server to OpenBSD some months ago (finally!) I decided to move from cgit to gotwebd too. To be fair, initially it wasn't a pleasure because, as gotwebd was heavily work in progress, there wasn't proper documentation, there were some bugs and so on. Lately however, with the 0.75 release approaching, the man pages were written and gotwebd become more stable too. I don't regret the decision to move to it and I'm rather happy now.
> If you're using OpenBSD running it is a no-brainer: on the latest -CURRENT you'll find a `gotwebd' package that includes the rc.d(8) script and the instructions on how to run it with httpd(8) in the manual. What's the situations for other systems?
> In this tutorial, we will show you how to install RawTherapee on Ubuntu 22.04 LTS. For those of you who didn’t know, RawTherapee is an open-source, powerful application that is used to edit and process raw photos. RawTherapee enables the users to process their raw images taken from the camera to clearer and sharper images. It is also used to convert the raw photos captured from digital cameras by professional photographers into different viewable image formats.
> This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of the RawTherapee on Ubuntu 22.04 (Jammy Jellyfish). You can follow the same instructions for Ubuntu 22.04 and any other Debian-based distribution like Linux Mint, Elementary OS, Pop!_OS, and more as well.
> Bento received a new feature, it is now able to report if the remote hosts are up-to-date, how much time passed since their last update, and if they are not up-to-date, how long passed since the configuration change.
> As Bento is using SFTP, it's possible to deposit information on the central server, I'm currently using log files from the builds, and compare this date to the date of the configuration.
> This will be very useful to track deployments across the fleet. I plan to also check the version expected for a host and make them report their version after an update, this should possible for flakes system at least.
> Project update: the report is now able to compare if the remote server is using the NixOS version we built locally. This is possible as NixOS builds are reproducible, I get the same result on the server and the remote system.
> The tool is getting in a better shape, the code received extra checks in a lot of place.
> A bit later (blog post update), I added the possibility to trigger the update from the user.
> For many people, computer clocks in your devices, network machines, and servers are generally accurate. But that’s not true! These clocks are manually maintained and backed by batteries which over time drift the clock, especially in the older machines.
> So why is accurate time so important? Having exact time on your machine is quite significant because of several reasons. Many aspects of your computer activity are linked with time. Perfectly synched time is crucial for tracking security-related issues; troubleshooting can become quite difficult if the timestamps in log files are incorrect. Even for financial services, keeping accurate time is critical.
> Google Chrome DevTools (developer tools) is the browser’s built-in comprehensive toolkit for developers. Which provides a large number of information that is useful for the developers for debugging purposes. You can also find the website’s request headers and response header values directly with dev tools.
> We have a few machine rooms. These aren't high-tech, modern server rooms, which is not surprising since they've generally been there for decades. As part of this, our machine rooms don't really have a specific set temperature that they're supposed to stay at. They're not supposed to get too hot, but the actual temperature they're at varies over the year and depends on a lot of things, including what we're running in them at the moment. To make sure that everything is (still) working, we have temperature sensors in the machine rooms that feed into our Prometheus setup.
> Recently we were looking at our dashboards and noticed that one of the machine rooms had an oddly high temperature. It wasn't alarmingly high, and we could see it going up and then jumping back down in a familiar pattern that we see in all of our machine rooms as the AC cycles on and off. But it felt like the temperature of that machine room should be lower and maybe something was wrong. Since we have a long metrics history (we keep years worth of Prometheus metrics), we started looking at historical temperature data for this machine room, both in the past of this year and at this time in previous years (to see if this was something that had happened at this time of year before).
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