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today's howtos

Submitted by Roy Schestowitz on Thursday 24th of March 2022 11:20:25 AM Filed under
HowTos

  • OpenBSD Webzine: Shell tips

    It is easy to add autocompletion to commands in ksh, however they are limited because they have to be evaluated when the shell is starting.

  • Sudo 1.9.10: using regular expressions in the sudoers file

    It has been possible to use wildcards in the sudoers file for many years. This can make configuration easier and more flexible, but it also introduces problems of its own. Regular expressions, introduced in in sudo 1.9.10, allow you to create more fine grained rules. From this blog you will learn about some of the problems when you use wildcards in your sudoers file, and how using regular expressions can resolve those problems.

  • Should I Upgrade to OpenZFS 2.1?

    When you upgrade an existing FreeBSD installation to 13.1, the new OpenZFS features are not yet available to existing pools and zpool status will indicate “Some supported features are not enabled on the pool.” This is by design as it allows the administrator to determine when the pools are “upgraded”—the assumption is that users will first research the new features and determine if any features will cause any compatibility issues within their environment.

    This write-up provides an overview of some of the new features in the OpenZFS 2.1 series. We’ll then discuss what to consider before upgrading your pools.

  • Storage Update: Part 2

    This is part 2 of my latest update on storage technology. Part 1, covering developments in DNA as a storage medium is here. This part was sparked by a paper at Usenix's File And Storage Technologies conference from Bianca Schroeder's group at U. Toronto and NetApp on the performanmce of SSDs at scale. It followed on from their 2020 FAST "Best Paper" that I discussed in Enterprise SSD Reliability, and it prompted me to review the literature of this area. The result is below the fold.

  • Some people don't deserve access to the machine room

    Let's see. You have physical access to a bunch of servers that are not yours. You do something to your workstation. The next thing you know, you can't reach some of those servers from that workstation. Do you undo what you did to your workstation? No. Do you find another machine? No. Do you ask someone else to also try hitting it? No. Do you try to hop into a machine that IS responding, and then try to poke one of the "dead" machines from it? No. Do you notice the difference between a host that truly is down and one that is just dropping your packets, i.e. ICMP host-unreachables from the router versus... you know, nothing? No.

    What do you do? You let yourself into the server room and start pushing front-panel reset buttons thinking it'll do something useful.

    It takes a certain kind of individual to go and do things like that.

»

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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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