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today's howtos

Submitted by Roy Schestowitz on Monday 8th of February 2021 10:49:52 PM Filed under
HowTos
  • How To Login With A USB Flash Drive Instead Of A Password On Linux Using pam_usb (Fork) - Linux Uprising Blog

    pam_usb is a PAM module that provides hardware authentication for Linux using ordinary USB flash drives, SD cards, MMC, etc.

    Using this, you'll be able to login without a password, by simply connecting a USB stick or memory card to your computer. This USB authentication also works when running terminal commands that require superuser - you will not be prompted for a password when using sudo for example.

    pam_usb works with any application supporting PAM, such as login managers (GDM, Lightdm, etc.), and su / sudo.

    For authentication, pam_usb makes use of the USB flash drive / memory card serial number, model and vendor, as well as optional One Time Pads (OTP). When One Time Pads are enabled (this is enabled by default, but you can disable it), the public user pad file is stored on the USB / memory card in a hidden folder called .pamusb, while the private key is stored in a hidden folder with the same name, stored in the user home directory.

  • Enable Disable Unattended Upgrades in Ubuntu – Linux Hint

    Update packages are essential for the system to protect the data because these packages have specific security patches. However, Ubuntu’s feature called Unattended Upgrades installs all of the latest security-related updates automatically.

  • How to install Autodesk on a Chromebook - also known as Eagle

    Today we are looking at how to install Autodesk on a Chromebook, also known as Eagle, on a Chromebook. Please follow the video/audio guide as a tutorial where we explain the process step by step and use the commands below.

  • A Guide to the Wireshark Command Line Interface “tshark” – Linux Hint

    In the earlier tutorials for Wireshark, we have covered fundamental to advanced level topics. In this article, we will understand and cover a command-line interface for Wireshark, i.e., tshark. The terminal version of Wireshark supports similar options and is a lot useful when a Graphical User Interface (GUI) isn’t available.

    Even though a graphical user interface is, theoretically, a lot easier to use, not all environments support it, especially server environments with only command-line options. Hence, at some point in time, as a network administrator or a security engineer, you will have to use a command-line interface. Important to note that tshark is sometimes used as a substitute for tcpdump. Even though both tools are almost equivalent in traffic capturing functionality, tshark is a lot more powerful.

  • How to Install Oracle JRE on Fedora – Linux Hint

    Java is one of the most used programming languages. Due to its object-oriented nature, it is preferred by developers. Java can be used to develop Mobile, Desktop and Web-based applications. Java allows running java programs on many platforms with the help of JVM. JVM has a JRE or Java Run-time Environment that provides resources and class libraries to Java code for execution. JDK is only needed for developing Java applications.

  • How to Upgrade Fedora Linux? – Linux Hint

    Fedora is a Linux distribution that is sponsored by Red Hat. The best thing is that it is free and open source. It is also available for desktop, server, and IoT systems. It has a different desktop environment like KDE Plasma, XFCE, LXQT, etc.

  • How to Install MySQL on Fedora – Linux Hint

    MySQL is a database system that provides database services for storing and managing data. It is one of the popular open-source databases.

    MySQL comes with the following commercial products:

    MySQL Standard Edition
    MySQL Enterprise Edition
    MySQL Cluster Carrier Grade Edition

    All these editions come with a price tag and are mostly suitable for commercial use. We will use the MySQL Community Edition, which is available for free usage under the GPL license for our this guide.

  • Elasticsearch Shard List – Linux Hint

    Elasticsearch’s cat API is very handy because it allows users to view information related to various Elasticsearch engine resources in Compact and Aligned Text (CAT).

    This tutorial will show you how to use the _cat API to view information about shards in an Elasticsearch cluster, what node the replica is, the size it takes up the disk, and more.

  • Elasticsearch Shard Rebalancing Tutorial – Linux Hint

    An Elasticsearch shard is a unit that allows the Elasticsearch engine to distribute data in a cluster. In Elasticsearch, we say that a cluster is “balanced” when it contains an equal number of shards on every node without having a large concentration of shards on a single node. Depending on how you configure Elasticsearch, it automatically performs shards rebalancing in your cluster to improve performance.

    Automatic shard rebalancing conforms to restrictions and rules like allocation filtering and forced awareness, leading to the most efficient and well-balanced cluster possible.

    NOTE: Do not confuse shard reallocation, which is the process of finding and moving unassigned shards to the nodes in which they reside, with rebalancing. Rebalancing takes assigned shards and moves them evenly to various nodes, the purpose being the equal distribution of shards per node.

  • Elasticsearch Reindex in Place – Linux Hint

    Elasticsearch indexing is an important feature that allows the engine to perform fast and accurately.

    However, as you know, once data gets mapped into an index, it’s unmodifiable. To do this, you will need to reindex the data with the modifications you require. This process may lead to downtime, which is not a very good practice, especially for a service that is already in circulation.

    To circumvent this, we can use index aliases, which allow us to switch between indices seamlessly.

  • Elasticsearch Reindex Change Field Type – Linux Hint

    Working with databases is very fun but can sometimes be challenging, especially when dealing with already-existing data.

    For example, if you want to change the type of a specific field, it might require you to take the service down, which can have grave repercussions, especially in services that process large amounts of data.

    Fortunately, we can use Elasticsearch’s powerful features such as Reindexing, ingest nodes, pipelines, and processors to make such tasks very easy.

    This tutorial will show you how to change a field type in a specific index to another, using Elasticsearch Ingest nodes. Using this approach will eliminate downtime that affects services while still managing to perform the field type change tasks.

  • Elasticsearch Create User – Linux Hint

    Users, privileges, and permissions are some of Elasticsearch’s primary security features. Security features allow you to secure your clusters and manage how users interact with the engine.

    In this quick guide, we will examine how to enable Elasticsearch Xpack security features and how to use security API to create users and roles.

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today's howtos

  • How to install go1.19beta on Ubuntu 22.04 – NextGenTips

    In this tutorial, we are going to explore how to install go on Ubuntu 22.04 Golang is an open-source programming language that is easy to learn and use. It is built-in concurrency and has a robust standard library. It is reliable, builds fast, and efficient software that scales fast. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel-type systems enable flexible and modular program constructions. Go compiles quickly to machine code and has the convenience of garbage collection and the power of run-time reflection. In this guide, we are going to learn how to install golang 1.19beta on Ubuntu 22.04. Go 1.19beta1 is not yet released. There is so much work in progress with all the documentation.

  • molecule test: failed to connect to bus in systemd container - openQA bites

    Ansible Molecule is a project to help you test your ansible roles. I’m using molecule for automatically testing the ansible roles of geekoops.

  • How To Install MongoDB on AlmaLinux 9 - idroot

    In this tutorial, we will show you how to install MongoDB on AlmaLinux 9. For those of you who didn’t know, MongoDB is a high-performance, highly scalable document-oriented NoSQL database. Unlike in SQL databases where data is stored in rows and columns inside tables, in MongoDB, data is structured in JSON-like format inside records which are referred to as documents. The open-source attribute of MongoDB as a database software makes it an ideal candidate for almost any database-related project. 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 MongoDB NoSQL database on AlmaLinux 9. You can follow the same instructions for CentOS and Rocky Linux.

  • An introduction (and how-to) to Plugin Loader for the Steam Deck. - Invidious
  • Self-host a Ghost Blog With Traefik

    Ghost is a very popular open-source content management system. Started as an alternative to WordPress and it went on to become an alternative to Substack by focusing on membership and newsletter. The creators of Ghost offer managed Pro hosting but it may not fit everyone's budget. Alternatively, you can self-host it on your own cloud servers. On Linux handbook, we already have a guide on deploying Ghost with Docker in a reverse proxy setup. Instead of Ngnix reverse proxy, you can also use another software called Traefik with Docker. It is a popular open-source cloud-native application proxy, API Gateway, Edge-router, and more. I use Traefik to secure my websites using an SSL certificate obtained from Let's Encrypt. Once deployed, Traefik can automatically manage your certificates and their renewals. In this tutorial, I'll share the necessary steps for deploying a Ghost blog with Docker and Traefik.

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