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today's howtos

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HowTos
  • How to Select All in Vim / Vi

    Knowing how to select all content in Vim or the Vi editor enables you to complete routines like copying and pasting in Linux quickly. The process can be tricky if you don’t understand how to use the editors properly or bind keys.

    For instance, you can select all in Vim/Vi by combining the gg, V, and G keys.

    ggVG
    Before that, you must be in the normal mode and know what the groups of keys mean or do.

    This article takes you through Vim/Vi modes, commands, and key bindings. You will find it simpler to select and use file contents with this knowledge.

  • How to Use Restic to Backup and Restore Data in Linux

    Restic is an open-source, secure, and cross-platform backup program. Using Restic we can store multiple versions of files and directories in an encrypted repository. Restic can be used to back up data to an external device or to cloud storage.

    Restic encrypts data with the AES-256 in counter mode and then authenticates it using the Poly1305-AES cryptographic message authentication code. This way Restic guarantees confidentiality and data integrity by utilizing cryptography.

    Restic does incremental backups which makes it easier and faster compared to some other backup programs. What this means is that it stores a base backup image and then for each subsequent backup, it stores the difference between that base image and the source machine. This leads to increased backup speed as only the modified data is backed up. It also consumes less backup space.

  • How to install PulseEffects on a Chromebook

    Today we are looking at how to install PulseEffects 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.

  • Rubenerd: Basic fix between pf tables and macros on FreeBSD

    I worked with a FreeBSD client this morning who’d messed up the pf rules on their VM firewall, and wanted to know how to fix them.

More in Tux Machines

today's howtos

  • How to Change Comment Color in Vim – Fix Unreadable Blue Color

    Are you annoyed about the comment color in vim? The dark blue color of the comment is often hard to read. In this tutorial, we learn how to change the comment color in Vim. There are few methods we can use to look vim comment very readable.

  • How to Add Repository to Debian

    APT checks the health of all the packages, and dependencies of the package before installing it. APT fetches packages from one or more repositories. A repository (package source) is basically a network server. The term "package" refers to an individual file with a .deb extension that contains either all or part of an application. The normal installation comes with default repositories configured, but these contain only a few packages out of an ocean of free software available. In this tutorial, we learn how to add the package repository to Debian.

  • Making a Video of a Single Window

    I recently wanted to send someone a video of a program doing some interesting things in a single X11 window. Recording the whole desktop is easy (some readers may remember my post on Aeschylus which does just that) but it will include irrelevant (and possibly unwanted) parts of the screen, leading to unnecessarily large files. I couldn't immediately find a tool which did what I wanted on OpenBSD [1] but through a combination of xwininfo, FFmpeg, and hk I was able to put together exactly what I needed in short order. Even better, I was able to easily post-process the video to shrink its file size, speed it up, and contort it to the dimension requirements of various platforms. Here's a video straight out of the little script I put together: [...]

  • Things You Can And Can’t Do

    And it got me thinking about what you can and can’t do — what you do and don’t have control over.

  • allow-new-zones in BIND 9.16 on CentOS 8 Stream under SELinux

    We run these training systems with SELinux enabled (I wouldn’t, but my colleague likes it :-), and that’s the reason I aborted the lab: I couldn’t tell students how to solve the cause other than by disabling SELinux entirely, but there wasn’t enough time for that.

  • Will the IndieWeb Ever Become Mainstream?

    This is an interesting question, thanks for asking it, Jeremy. I do have some history with the IndieWeb, and some opinions, so let’s dive in.

    The short answer to the question is a resounding no, and it all boils down to the fact that the IndieWeb is really complicated to implement, so it will only ever appeal to developers.

  • How to Install CUPS Print Server on Ubuntu 22.04

    If your business has multiple personal computers in the network which need to print, then we need a device called a print server. Print server act intermediate between PC and printers which accept print jobs from PC and send them to respective printers. CUPS is the primary mechanism in the Unix-like operating system for printing and print services. It can allow a computer to act as a Print server. In this tutorial, we learn how to set up CUPS print server on Ubuntu 22.04.

Open Hardware: XON/XOFF and Raspberry Pi Pico

  • From XON/XOFF to Forward Incremental Search

    In the olden days of computing, software flow control with control codes XON and XOFF was a necessary feature that dumb terminals needed to support. When a terminal received more data than it could display, there needed to be a way for the terminal to tell the remote host to pause sending more data. The control code 19 was chosen for this. The control code 17 was chosen to tell the remote host to resume transmission of data.

  • Raspberry Pi Pico Used in Plug and Play System Monitor | Tom's Hardware

    Dmytro Panin is at it again, creating a teeny system monitor for his MacBook from scratch with help from our favorite microcontroller, the Raspberry Pi Pico. This plug-and-play system monitor (opens in new tab) lets him keep a close eye on resource usage without having to close any windows or launch any third-party programs. The device is Pico-powered and plugs right into the MacBook to function. It has a display screen that showcases a custom GUI featuring four bar graphs that update in real-time to show the performance of different components, including the CPU, GPU, memory, and SSD usage. It makes it possible to see how hard your PC is running at a glance.

Security Leftovers

How to Apply Accent Colour in Ubuntu Desktop

A step-by-step tutorial on how to apply accent colour in Ubuntu desktop (GNOME) with tips for Kubuntu and others. Read more