today's howtos
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Using the udp-balancer() source of syslog-ng PE
UDP-based log collection is so last century. We had TCP-based log collection for decades and TLS encryption to secure connections. Still, UDP is in wide use, especially at large companies and industrial automation, where every change is slow. In most cases, UDP logging is used by networking devices, but sometimes it is just left there from ancient times and people are reluctant to change it. In either case, at higher message rates it can lead to performance problems and thus to message loss.
Originally, the udp() source of syslog-ng was single-threaded. That does not scale well with typical multi-core CPUs with slower cores. There are many tricks to enhance UDP performance in syslog-ng. Combining those with the udp-balancer() source of syslog-ng PE gives the most reliable solution.
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What is Docker? The spark for the container revolution
Docker is a software platform for building applications based on containers—small and lightweight execution environments that make shared use of the operating system kernel but otherwise run in isolation from one another. While containers have been used in Linux and Unix systems for some time, Docker, an open source project launched in 2013, helped popularize the technology by making it easier than ever for developers to package their software to “build once and run anywhere.”
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The Evolution of Digital Data Loggers
Digital data loggers have come a long way over the years. Data loggers are small digital devices that are used to record, store, and sometimes transmit large amounts of data that is gathered through sensors. Like many other kinds of technology, the design and construction of digital data loggers has been altered and improved over the years.
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It should come as no surprise that this simple piece of technology has come such a long way in the last 100-plus years. When the first chart recorder for environmental monitoring was patented, the first transcontinental phone call was also placed. Now, we have high-tech computers in our pockets that we call phones; data loggers have made the same technological leaps.
The move from chart recorders to data loggers was a massive step forward, but those early devices are a far cry from what today’s digital data loggers are capable of doing. Above are listed just a handful of the benefits the latest data loggers provide. Depending on your organization, data loggers may well have even more specific advantages.
The main point is, if your organization is not using the latest version of this great technology, it is missing out. There is no excuse in 2021 for not at least considering what a modern digital data logger can do for you and how it can affect your manufacturing, storage and transportation processes, your compliance with regulations and standards and, ultimately, your bottom line.
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Deescalating Tensions
One of the great attributes of SVG is that its text nature lends itself to be easily version controlled. Inkscape uses SVG as its native format (and extends it using its private namespace).
Unfortunately it uses the documents themselves to store things like canvas position and zoom state. This instantly erases one of the benefits for easy version control as every change instantly turns into unsolvable conflict.
Luckily you can at least give up the ability to store the canvas position for the greater good of not having merge conflicts, if you manage to convince your peers to change its defaults. Which is what this blog post is about
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Move files in the Linux terminal
To move a file on a computer with a graphical interface, you open the folder where the file is currently located, and then open another window to the folder you want to move the file into. Finally, you drag and drop the file from one to the other.
To move a file in a terminal, you use the mv command to move a file from one location to another.
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Install OpenVPN on your Linux PC | Opensource.com
OpenVPN creates an encrypted tunnel between two points, preventing a third party from accessing your network traffic. By setting up your virtual private network (VPN) server, you become your own VPN provider. Many popular VPN services already use OpenVPN, so why tie your connection to a specific provider when you can have complete control?
The first article in this series demonstrated how to set up and configure a Linux PC to serve as your OpenVPN server. It also discussed how to configure your router so that you can reach your VPN server from an outside network.
This second article demonstrates how to install the OpenVPN server software using steps customized from the OpenVPN wiki.
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