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today's howtos

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  • Simple Raspberry Pi powered SMS Gateway: make your projects send SMS with a simple REST API


    Install gammu-smsd, get the API code from github and you'll be able to send and receive SMS via API.

  • Use dmseg to check your Linux system's kernel message buffer | Network World

    The dmesg command displays the content of the kernel's message buffer since the system's most recent boot. It displays a lot of details on how the system is working and problems it might be running into that you won't normally see. That can be a lot of data, but there are several tricks for paring it down.

    For example, Even though the system queried below has only been up a little more than three days, it's collected more than a thousand lines of data.

  • Working with gnome-boxes - Unixcop the Unix / Linux the admins deams

    In my PC I’ve worked with Virtual box for years. Then virtual box, for some reason, was removed from the Debian repository. As I wasn’t using those VMs for something critical I’ve just didn’t bother to find out why or to search some alternate repo. Few months ago I need some virtual machines on my PC, so I began working with gnome-boxes.

  • How To Install Terminalizer on Ubuntu 20.04 LTS - idroot

    In this tutorial, we will show you how to install Terminalizer on Ubuntu 20.04 LTS. For those of you who didn’t know, Terminalizer is a very useful terminal recording tool designed for different distributions of the Linux operating system. Terminalizer works in the same way as a desktop screen recorder but instead runs in your terminal. It has the capability to record all the activities that you perform on the Linux terminal and then save them in the form of an animated GIF.

    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 Terminalizer on Ubuntu 20.04 (Focal Fossa). You can follow the same instructions for Ubuntu 18.04, 16.04, and any other Debian-based distribution like Linux Mint.

  • How To Install Yunohost on Debian 10 Buster Made Simple

    This tutoriall will explain how one can install Yunohost based on Debian 10 with examples in step by step. This tutorial is practiced locally in a virtual machine and you can practice later on a real computer once you understood how to play it. Now let's start practicing!

  • How to Change User Passwords in Linux - ByteXD

    In this tutorial we’ll explain how to change user passwords in Linux using the passwd command, from the command-line.

    We’ll show you how to change your current user’s password, as well as changing, expiring, or locking passwords for other users.

    These commands should work on any Linux distribution, such as Ubuntu, Debian, Linux Mint, CentOS, Rocky Linux, etc.

  • How to Install Telegraf Configure InfluxDB2 output in Debian 11

    In this guide we are going to learn how to install Telegraf and configure InfluxDB v2 output on a Debian 11.

    Telegraf is a plugin-driven server agent for collecting & reporting metrics, and is the first piece of the TICK stack. Telegraf has plugins to source a variety of metrics directly from the system it’s running on, pull metrics from third-party APIs, or even listen for metrics via a statsd and Kafka consumer services. It also has output plugins to send metrics to a variety of other datastores, services, and message queues, including InfluxDB, Graphite, OpenTSDB, Datadog, Librato, Kafka, MQTT, NSQ, and many others.

  • How to Install and Configure InfluxDB2 in Debian 11

    InfluxDB is the database in which we will store the metrics sent from the agent. This database is designed to withstand high write and read loads.

    InfluxDB is an open source time series database. It has everything you need from a time series platform in a single binary – a multi-tenanted time series database, UI and dashboarding tools, background processing and monitoring agent. All this makes deployment and setup a breeze and easier to secure.

    The InfluxDB Platform also includes APIs, tools, and an ecosystem that includes 10 client and server libraries, Telegraf plugins, visualization integrations with Grafana, Google Data Studio, and data sources integrations with Google Bigtable, BigQuery, and more.

  • How to Install and Use Ping Command in Linux

    PING is undoubtedly a millennial word. It’s rooted in quotidian life and henceforth has become a concept to be unveiled. Many of us might be known of the fact that the word ‘ping‘ is not actually a word but an acronym. PING stands for Packet Internet Groper. The meaning
    says it all.

    Pinging is a notion to observe the connectivity between two systems, to check whether the remote system is online. Technically, the word ping lies in the domain of network communication. It deals with the notion of transferring and accepting the packets from source to destination system.

  • How to install system updates using Webmin - Unixcop the Unix / Linux the admins deams

    Hello, friends. We continue with Webmin and now we will explain very briefly how to install system updates using Webmin. This post is part of our series dedicated to this tremendous application.

  • How to use monitoring to troubleshoot Ansible Automation Platform | Enable Sysadmin

    Running an Ansible automation controller in OpenShift provides an easy way to scale an Ansible automation controller. However, as with any virtualization platform, you need to enable the Ansible automation controller to run as efficiently as possible.

    Often, OpenShift runs on top of another virtualization platform, and understanding how resources are used at the various virtualization levels is essential. Overcommitting CPU and memory resources in your virtualization platform can impact OpenShift performance. Therefore, it is important to have a 1:1 commit ratio for CPU and memory in your virtualization platform and let OpenShift manage resource overcommitment. In addition to looking at CPU and memory overcommitment, you need to understand what other pods are running on the OpenShift instances in order to prevent resource conflicts.

    Proper management of OpenShift guarantees the availability of the Ansible automation controller and other applications running in the OpenShift environment. Quotas on namespaces set the maximum amount of CPU and memory resources a project can consume, limiting the impact one project can have on other projects. In addition, the request and limit settings for the task container set the CPU and memory resources the Ansible automation controller has for running jobs.

    By default, the Ansible automation controller installer sets the CPU request to 1,500 millicores and the memory request to 2GBs. You can use the task_cpu_request and task_mem_request variables to set request sizes for the task container in the Ansible automation controller installer inventory. These settings directly impact the number of forks an Ansible automation controller instance has available for running jobs.

More in Tux Machines

Databases: MongoDB/NoSQL, Firebird, and Rqlite/SQLite

  • Top 10 features of MongoDB Atlas | FOSS Linux

    MongoDB is a NoSQL general-purpose document-oriented database that is free to use. It is a scalable, versatile NoSQL document database platform built to overcome the constraints of previous NoSQL solutions and the approach of relational databases. It helps the user store and deals with an enormous amount of data. MongoDB’s horizontal scaling and load balancing capabilities have given application developers unprecedented flexibility and scalability. There are different MongoDB editions; however, we will focus on MongoDB Atlas in this article. MongoDB Atlas is a multi-cloud database service created by the MongoDB team. Atlas makes it easy to deploy and manage databases while also giving users the flexibility they need to develop scalable, high-performance global applications on the cloud providers of their choice. It is the world’s most popular cloud database for modern applications. Developers can use Atlas to deploy fully managed cloud databases on AWS, Azure, or Google Cloud. Developers can relax easily knowing that they have rapid access to the availability, scalability, and compliance they need for enterprise-level application development.

  • Node-firebird-driver-native version 2.4.0 has been released with a few features added.

    Node-firebird-driver-native version 2.4.0 has been released with a few features added.

  • Rqlite 7.0 Released For Distributed Relational Database Built Atop SQLite - Phoronix

    Rqlite 7.0 is now available as a lightweight, distributed relational database. This open-source database system for cluster setups is built atop SQLite while aiming to be easy-to-use and fault-tolerant.

Writing an open source GPU driver – without the hardware

After six months of reverse-engineering, the new Arm “Valhall” GPUs (Mali-G57, Mali-G78) are getting free and open source Panfrost drivers. With a new compiler, driver patches, and some kernel hacking, these new GPUs are almost ready for upstream. In 2021, there were no Valhall devices running mainline Linux. While a lack of devices poses an obvious obstacle to device driver development, there is no better time to write drivers than before hardware reaches end-users. Developing and distributing production-quality drivers takes time, and we don’t want users to be reliant on closed source blobs. If development doesn’t start until a device hits shelves, that device could reach “end-of-life” by the time there are mature open drivers. But with a head start, we can have drivers ready by the time devices reach end users. Let’s see how. Read more Also: Rosenzweig: Writing an open source GPU driver – without the hardware And related: Graphics Driver Changes Begin Lining Up For Linux 5.18

Security Leftovers

  • CVE-2021-4034 – Ariadne's Space

    Before we get into this, I have seen a lot of people on Twitter blaming systemd for this vulnerability. It should be clarified that systemd has basically nothing to do with polkit, and has nothing at all to do with this vulnerability, systemd and polkit are separate projects largely maintained by different people. We should try to be empathetic toward software maintainers, including those from systemd and polkit, so writing inflammatory posts blaming systemd or its maintainers for polkit does not really help to fix the problems that made this a useful security vulnerability.

  • Windows ransomware LockBit makes the jump to Linux [Ed: Pro-Windows site. Misses the point that over 90% of ransomware is a Windows problem.]

    First, they came for Windows. Then, for Tux. As cool as Linux is, it's increasingly becoming a target for ransomware-friendly cyber criminals intent on ruining people's days.

  • These critical security bugs put Linux servers at risk of attack [Ed: Attack from the inside maybe; you need to actually have an account on such machines to begin with... compare to Windows with remotely-exploitable full compromise bugs/back doors]
  • Patch Now: A newly discovered critical Linux vulnerability probably affects your systems
  • IoT security certification group gains steam [Ed: Another fake security consortium? Their shoddy products might be best off avoided altogether, as there's rarely a practical need for such gimmicks.]

    The ioXT Alliance, which offers a certification program for IoT security, announced it has certified 195 products and grown to 580 members. Meanwhile, Timesys is seeking participants for a survey on IoT security.

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