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“SR BACKEND FAILURE 181” error

Open a Port on Ubuntu 20.04 - Step by step guide ?

This article covers how to open ports on Ubuntu with some examples like opening port 22, port 80, port 443, and port 53 using the ufw command.

To Open port for a specific webserver such as Apache or Nginx execute the bellow Linux command:

$ sudo ufw allow in "Apache Full"
$ sudo ufw allow in "Nginx Full"

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Git Authentication failed

Install Tor on Ubuntu 20.04 - Step by step guide ?

This article covers how to install tor on Ubuntu 21.10. In fact, Tor is a connection-based low-latency anonymous communication system. Basically, Tor provides a distributed network of relays. Users bounce their TCP streams (web traffic, ftp, ssh, etc) around the relays, and recipients, observers, and even the relays themselves have difficulty learning which users connected to which destinations.

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Citrix XenServer internal error

Install Stellarium on Debian 11 Bullseye - Step by step guide ?

This article covers how to install Stellarium using apt repositories on Debian 11 system. In fact, Stellarium renders 3D photo-realistic skies in real-time. With Stellarium, you really see what you can see with your eyes, binoculars or a small telescope.

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citrix protocol driver error

Install Todoman on Debian 11 Bullseye Server - Step by step guide ?

This article covers how to install todoman on Debian 11 system. In fact, Todoman is a simple, standards-based, cli todo (aka: task) manager. Todos are stored into icalendar files, which means you can sync them via CalDAV using, for example, vdirsyncer.


How To Uninstall todoman from Ubuntu 21.04 ?

To uninstall only the todoman package we can use the following command:

$ sudo apt-get remove todoman

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Install QPrompt on Debian 11 Bullseye system - Step by step guide ?

This article covers how to download and install QPrompt on your Debian 11 Linux system. In fact, You can make your presentation flawless with a QPrompt tool, an alternative to a teleprompter.


How to install QPrompt on Debian via snaps ?

1. Enable snapd

On Debian 9 (Stretch) and newer, snap can be installed directly from the command line:

$ sudo apt update
$ sudo apt install snapd
$ sudo snap install core


2. Install QPrompt

To install QPrompt, simply use the following command:

$ sudo snap install qprompt

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Error unable to connect to node rabbit

Install LogSeq on Debian 11 Bullseye Using AppImage - Step by step guide ?

This article covers the installation of a portable Linux application on Debian 11 desktop. In fact, Logseq is an application to create notes, knowledge graphs and more. In addition we can use existing Markdown or org mode files to simply edit, write and save any new notes.


Features of Logseq:

  • Markdown Editor.
  • Org-mode File Support.
  • Backlink.
  • Page and block references (link between them).
  • Page and block embed to add quotes/references.
  • Support for adding tasks and to-do lists.
  • Ability to add tasks as per priority or by order A, B, C..
  • Publish pages and access it using localhost or GitHub pages.
  • Advance commands support.
  • Ability to create a template from your existing resource to re-use it.
  • Page alias.
  • PDF highlights.
  • Create cards and quickly review them to memorize things.
  • Excalidraw integration.
  • Zotero integration.
  • Add a custom theme by simply creating a custom.css file. There are available community-made files for quick use as well.
  • Custom keyboard shortcuts.
  • Ability to self-host Logseq.
  • Cross-platform support.

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