today's howtos
-
How to verify your Linux Mint ISO image file - Linux Mint 21 edition - Real Linux User
Being conscious about your actions and decisions that could make your Linux environment more secure, is becoming more and more important. When you download a Linux ISO image file to create a bootable live environment to test a Linux distribution and eventually install it on your production machine, it is important to be sure about its authenticity and integrity. In this article, as part of my Linux Mint tutorial series, I want to explain how to verify the integrity and authenticity of your Linux Mint ISO image file as a good start for your secure Linux Mint journey.
-
updlockfiles: Manage lockfiles in PKGBUILDs for upstreams that don't ship them - vulns.xyz
I’ve released a new tool to manage lockfiles for Arch Linux packages that can’t use a lockfile from the official upstream release. It integrates closely with other Arch Linux tooling like updpkgsums that’s already used to pin the content of build inputs in PKGBUILD.
-
How to install Krita on Linux Mint 21 - Invidious
In this video, we are looking at how to install Krita on Linux Mint 21.
-
How much swap space we're using across our servers (in October 2022)
Because our servers have different amounts of swap configured, I'm going to look at both how much swap space has been left free and how much swap space has been used. The simpler number is the amount of remaining (free) swap space. Over the past 30 days, three of our compute servers used all of their swap space, our primary login server ran down to only 13.5 MBytes free, and our test virtualization server got as low as 214 Mbytes free. Everything else always had at least 512 Mbytes free. A potentially more interesting number is the average amount of free swap space over the last 30 days, which will factor out short term spikes in swap space usage. Here, nothing had less than 550 Mbytes of swap free, even the compute servers. Looking at the standard deviation of free swap over time suggests that many of our servers don't vary much in their swap usage.
-
OpenSSL generate self signed certificate with SAN in one command (subject alternative name)
This small one liner lets you generate an OpenSSL self signed certificate with both a common name and a Subject Alternative Name (SAN). Most guides online require you to specify a separate config file but this guide uses a bash trick (process substitution) to pass such a config file to OpenSSL via the command line. If you are using OpenSSL 1.1.1 or higher, there now finally is a built in command line option which I'll also cover.
-
Running Netdata on the Raspberry Pi
Best of all, Netdata provides all the data it collects in an elegant interface with easy-to-read graphs. It even has support for displaying all of its data in real time.
You can even use this metric tool to identify what software on your Raspberry Pi is causing high memory usage or consuming too much CPU time.
Over the following few sections, we will show you how to install and run the latest version of Netdata on your Raspberry Pi.
-
Two views of CPU utilization (a realization)
The customary 0% to 100% measure is really a measure of how much of the machine you're using and how much you have left. If you're at 75% CPU utilization, you're using three quarters the machine and have a quarter of it left (more or less). This is a perfectly fine measure and often what you care about, but it's not the only measure. Another measure is what the Linux 'top' command tells you, which is how much CPU you're using, or to put it another way, how many CPUs you're using. How much CPU you're using is generally going to be a better view into how much work is being done by various things, without having to mentally re-scale a 0% to 100% number to account for things like how 10% of a 4-CPU machine is a lot less work being done than 10% of a 112-CPU machine.
-
Linux mkdir Command Examples
In this guide, we will take a look at the mkdir command which is used to create a directory. We will also discuss some of the practical examples of it that will help beginners to operate the Linux system confidently.
As Linux users, we use files and directories on a regular basis. Files allow us to store important data whereas directories allow us to organize files in a proper way. In addition to this, we often create a hierarchical directory structure to organize the contents in a better way.