today's howtos
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Everything About /proc File System in Linux
Proc file system (short for “procfs”, referring to “/proc” dir) is a virtual file system (not a real file system) that is mounted on system boot to store information related to running processes.
The proc file system stores useful information about the running process and also lets the kernel space and user space communicate with each other.
When you list the content of the “/proc” directory using the ls command, you will get a bunch of directories, and their names will be in integer format, where “integer” refers to a process identifier.
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How to Delete Apps on a Chromebook (6 Methods) | Beebom
Compared to Windows and Mac, apps and programs are lightweight on Chrome OS. But if you have a low-end Chromebook, they can easily eat up your crucial resources. In addition, if you use Android apps, Chrome extensions, and Linux apps on your Chromebook, they can slow down your device over time. To avoid such a scenario, you can delete apps on your Chromebook. It will free up storage, CPU resources, and most importantly, memory. So if you want to uninstall apps on a Chromebook, including web apps, Android apps, Chrome extensions, and Linux apps, follow our detailed guide below.
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How To Remove RPM Package on Linux - idroot
In this tutorial, we will show you how to remove RPM packages on Linux. For those of you who didn’t know, RPM (Red Hat Package Manager) is a package management system used by Linux distributions such as Red Hat, CentOS, and Fedora. It is designed to allow users to easily install, update, and remove software packages on their systems. RPM packages are files that contain software and metadata about the software. The metadata includes information such as the name, version, and dependencies of the package, as well as instructions for installing and removing the software.
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 RPM Packages on Linux.
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Day 70: the defined pseudo-class
:defined represents any element that has been defined. This includes standard elements and custom elements that have been successfully defined.
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Day 69: width in container queries
In a media query, it’s obvious what width means. It always refers to the width of the viewport. With size container queries it’s not that obvious.
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What's In a JPEG?
This image is 299 by 400 pixels. Each pixel consists of three components, red, green, and blue. The brightness of each component is encoded as an 8-bit value, so each pixel contains three bytes of information. Multiply that by the number of pixels, and we get a file size of around 350 kilobytes. Yet the image shown above is actually only 43kB in size, just 12% of the value we just calculated. In other words, by encoding the image using the JPEG format, we can achieve a compression ratio of roughly 8:1. How does JPEG accomplish this astonishing feat? Let's dive in.
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Some practical notes on the systemd cgroups/units hierarchies
At the top level, systemd has a -.slice (the root slice or cgroup). Underneath that are up to three slices: user.slice, for all user sessions, system.slice, for all system services, and machine.slice, for your virtual machines that are started in ways that systemd knows about (for example, libvirt). You'll probably always have a system.slice and usually a user.slice if you're looking at a machine, but many of your machines may not have a machine.slice. There's also an init.scope, which has PID 1 in it, and possibly some essentially empty .mount cgroups that systemd-cgls won't bother showing you.
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Web-Fonts - Don't let “them” get you
The question had once been valid, but it is no more. This is just one of those things which you should invest some reflection in, when you want to style HTML-documents to use certain fonts:
Web-Fonts are nowadays (2020) just fonts that you use on the Web.
What "they" want you to believe is that a Web-Font is a font which "works" on the web, in contrast to others which do not! While nobody can give you a list of fonts which do currently not work on the Web, they do have Web-Fonts to offer. And as you want to be sure that your documents are nice and readable.., you read on and do not take any decisions until you prove me right or wrong, at the end of this block-post and maybe some research and verification.