Communication & Collaboration#

1. Matrix.org - A decentralized messaging platform.
2. Zulip - An open source group chat application.
3. Nextcloud - A cloud storage and collaboration suite.
4. ownCloud - A self-hosted file sync and share server.
5. Mattermost - An open-source team collaboration hub.
6. Freenode - Internet Relay Chat (IRC) network for open source projects.
7. GitLab - Web-based Git repository manager with CI/CD pipeline features.
8. GitPod - A code ide that spins up dev environments with one click.

Social Media & Forums#

1. Mastodon - A decentralized social network based on the GNU social/G+/Twitter microblogging platform software.
2. Friendica - An open-source distributed communication and social networking platform.
3. Flarum - A forum software that focuses on simplicity, speed, elegance, and usability.
4. Discourse - A modern, open, and versatile discussion platform.
5. phpBB - A popular open-source forum package.
6. Fluentd - A data collection tool for collecting events from various data sources to a variety of destinations.
7. Logstash - An open-source data processing pipeline that can collect data from diverse sources and channel it into a unified format.
8. Kibana - An open source data visualization and exploration tool built on top of Elasticsearch.

Developer Tools#

1. Docker - A platform for developing, shipping, and running applications.
2. Jenkins - An extensible continuous integration server.
3. GitLab CI/CD - Continuous Integration/Continuous Deployment.
4. Travis CI - A cloud-based continuous integration service for GitHub and Bitbucket projects.
5. JIRA - Project management software that includes scrum, sprint planning, backlog prioritization, release tracking features.
6. Redmine - A free project management web application.
7. Tuleap - An integrated project management tool combining the best practices in IT project management with modern and open-source tools.

Email & Calendaring#

1. Roundcube - A web-based mail client.
2. Horde Groupware Web Application Framework - A groupware suite.
3. Zimbra - An email, calendar, and collaboration system.
4. Sogo - A combination of a webserver component for iCalendar, vCard, and SMTP access and client libraries for various IMAP and CalDAV clients.
5. DuckDuckGo Privacy Browser - A privacy-oriented browser based on Firefox.

Data Management#

1. Elasticsearch - A distributed, RESTful search and analytics engine.
2. Kibana - For visualizing Elasticsearch data in real time.
3. PostgreSQL - A powerful, open-source object-relational database system.
4. MongoDB - An open-source document-oriented database.
5. Redis - An in-memory key-value store used as a database, cache and message broker.
6. Memcached - A general-purpose distributed memory caching system.
7. Neo4j - A graph database that allows for flexible queries using Cypher query language.
8. InfluxDB - An open-source time series database.

Office & Productivity#

1. LibreOffice - An open-source office suite.
2. OnlyOffice - A platform that combines online text editors, document and project management, file storage in a single solution.
3. Apache OpenOffice - Another free and open-source office suite.
4. Zimbra Collaboration Suite - An email and calendar server with an optional desktop client.

Infrastructure & Monitoring#

1. Nagios - A monitoring system for systems, networks, and infrastructure.
2. Zabbix - An enterprise-class open source distributed monitoring solution.
3. Prometheus - A monitoring system and time series database.
4. InfluxDB - For storing and analyzing metrics.
5. Kubernetes - An open-source container-orchestration system for automating computer containers.
6. OpenVPN - A robust and highly configurable VPN solution.
7. NGINX - A high performance web server and reverse proxy server.
8. Traefik - A modern HTTP reverse proxy and load balancer.
9. HAProxy - A reliable, efficient, and flexible load balancing solution.

Multimedia & Entertainment#

1. Plex - A client-server media management and streaming platform.
2. Emby - An extensible media server and player with rich metadata capabilities.
3. Radarr - A companion application to Sonarr for downloading new episodes of TV shows.
4. Sonarr - An index based, TV show downloader that uses NZB files.
5. Jackett - An indexing engine that searches many different websites.
6. Deluge - A lightweight and feature-rich BitTorrent client.
7. Rutorrent - An easy-to-use bittorrent client with a lot of features.
8. Lidarr - An automated music indexer that can automatically download your favorite albums.

E-commerce#

1. Magento Open Source - A flexible e-commerce platform for businesses of all sizes.
2. PrestaShop - An open-source e-commerce solution.
3. OpenCart - A free, open-source shopping cart system.
4. WooCommerce - A WordPress plugin that turns your site into a fully-fledged online store.

Security#

1. fail2ban - A network security tool that analyzes log files for failed login attempts and then bans the IP addresses of those who succeed in multiple unsuccessful login attempts.
2. Cryptography - Tools and libraries for encryption and decryption.
3. OSSEC - A powerful open-source host-based intrusion detection system.
4. Pulse Secure Virtual Desktop - A secure access service edge (SASE) platform that enables organizations to deliver integrated, cloud-first application and network access security.
5. ClamAV - An open-source antivirus engine for detecting Trojans, viruses, malware, and other malicious threats.

Cloud & Storage#

1. OpenStack - A cloud operating system for delivering various cloud services.
2. Cloudflare - An internet performance and security company that provides a network of distributed servers to protect websites from cyber attacks.
3. Nextcloud - Already listed earlier, but worth mentioning again as it’s also a full-fledged cloud service.
4. OpenVPN - For creating secure remote access to your home lab.

Web Servers#

1. Apache HTTP Server - The world’s most widely used web server.
2. NGINX - A high performance HTTP and reverse proxy server.
3. Caddy - An automated web server with automatic HTTPS.

Developer Tools & IDEs#

1. Visual Studio Code - A code editor redefined and optimized for building and debugging modern web and cloud applications.
2. Eclipse - An open-source integrated development environment (IDE).
3. IntelliJ IDEA - A powerful IDE for JVM-based languages like Java, Kotlin, Scala and Android.

Learning & Educational Resources#

1. Khan Academy - Provides free online education for a variety of subjects.
2. Moodle - An open-source course management system that can be used to create an online learning environment.
3. Canvas - A cloud-based learning management system (LMS).
4. edX - An online learning platform founded by Harvard University and the Massachusetts Institute of Technology.

Game Servers#

1. Minecraft Server - To run your own Minecraft server.
2. SteamCMD - Steam’s content delivery tool to help manage game updates on dedicated servers.
3. ARK: Survival Evolved Server - To host a survival multiplayer game server for ARK.

File Storage & Backup#

1. BorgBackup - A deduplicating backup program that supports file and block storage.
2. Bacula - An open-source enterprise-level data protection, restore, and recovery system.
3. Rclone - A tool to sync directories between cloud storage providers.

Media Streaming & DVR#

1. Emby - For centralized media streaming within your network.
2. MediaPortal - A free open source media center software for Microsoft Windows.
3. DVR-PC - A complete TV recording, streaming and live TV viewing solution that runs on Linux (and Windows) PCs.

Other Tools#

1. Mattermost - Team communication tool, which also has a collaboration suite component.
2. GitPod - A web-based code server with pre-configured tools for full-stack development environments.
3. GitBucket - An easily installable GitHub compatible Git server written in Scala.
4. Zabbix - For monitoring your infrastructure and applications.

1. Install Ghostscript: If it’s not already installed, you can install Ghostscript using your distribution’s package manager. For Debian-based systems like Ubuntu, use:

   sudo apt-get update
   sudo apt-get install ghostscript

   For Red Hat-based systems like Fedora, use:

   sudo dnf install ghostscript

2. Compress the PDF: Once Ghostscript is installed, you can compress your PDF file using the following command:

   gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/screen -dNOPAUSE -dQUIET -dBATCH -sOutputFile=output.pdf input.pdf

   In this command:

   • input.pdf is the name of your original PDF file.
   • output.pdf is the name of the compressed PDF file that will be created.
   • -dPDFSETTINGS=/screen sets the quality of the PDF. This setting is for the lowest quality and smallest file size, which is suitable for viewing on a screen. Other options include /ebook for medium quality, /printer for high quality, and /prepress for high quality with large file size.

To reduce the compression level in Ghostscript when converting or processing a PDF file, you can adjust the -dPDFSETTINGS option. The command you provided is set to use the /screen setting, which applies high compression and low-resolution output, suitable for viewing on a screen but not ideal for printing or archiving.

If you’re looking to shut down a virtual machine running on a Proxmox Virtual Environment (PVE), you can use the Proxmox command-line interface (CLI) to accomplish this task quite effectively. The command for shutting down a VM in Proxmox is qm shutdown, followed by the ID of the virtual machine you’d like to shut down. Here’s how to do it:

1. Access the Server: First, log in to your Proxmox server via SSH.

We’ll be diving straight into the core concepts and components that will help you become proficient in Ansible. This tutorial assumes that you have already installed Ansible on your system and have a basic understanding of what Ansible is.

Setting Up the Environment#

SSH Key Generation#

If you haven’t already, generate an SSH key pair on your Ansible control node.

ssh-keygen -t rsa

SSH Key Distribution#

Copy the SSH public key to all your target nodes.

Using pdftotext:#

1. Installation:

   • If it’s not installed, you’ll need to install the poppler-utils package which includes pdftotext.

   sudo apt install poppler-utils

   or

   yum install poppler-utils

   depending on your distribution.

2. Usage:

   • Once installed, you can convert a PDF to text and then count the words as follows:

   pdftotext input.pdf - | wc -w

   Here, input.pdf is your source PDF file, and wc -w counts the number of words. The - in pdftotext specifies that the output should be sent to stdout, which is then piped into wc.

Psql is a command-line interface for interacting with PostgreSQL, a powerful and open source relational database system. Brew is a package manager for macOS that makes it easy to install and manage software. Here are the steps to install psql with brew:

• First, install the brew package manager if you don’t have it already. You can do this by running the following command in your terminal:

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

• Second, update brew by running the following commands:

brew doctor
brew update

• Third, install libpq by running the command:

brew install libpq

Libpq is a library that contains psql and other PostgreSQL client utilities.

Kubernetes is a powerful platform for managing containerized applications across a cluster of nodes. However, sometimes you may want to have more control over which pods are scheduled on which nodes, for various reasons such as performance, security, or cost.

What are taints and tolerations?#

Taints and tolerations are a feature of Kubernetes that allow you to mark nodes with certain attributes or conditions, and then specify which pods can or cannot be scheduled on those nodes based on those attributes or conditions. Taints are applied to nodes, and tolerations are applied to pods.

Kubernetes tolerations are a way of allowing pods to be scheduled on nodes that have taints, which are markers that repel pods by default. Tolerations let you control which pods can run on which nodes, based on the pod’s requirements and the node’s characteristics.

What are Kubernetes tolerations?#

Kubernetes tolerations are a pod property that allow a pod to be scheduled on a node with a matching taint. Taints are the opposite of node affinity, which is a way of attracting pods to a set of nodes. Taints are applied to nodes and act as a repelling barrier against new pods. Tainted nodes will only accept pods that have been marked with a corresponding toleration.

find . -name "*.md" -type f -exec sed -i '/line of text/d' {} \;

This command uses find to locate all .md files in the current directory and its subdirectories recursively. The -exec option is used to execute the sed command on each file found. The {} is replaced by the name of each file found, and the \; is used to terminate the -exec option.

The sed command removes any line containing the string “line of text” from each file found.

PhantomJS is a headless web browser for automating web page interactions.

To install PhantomJS on Ubuntu 22.10, you can follow these steps:

• Update your system packages with sudo apt update && sudo apt upgrade
• Install the required packages with sudo apt install build-essential chrpath libssl-dev libxft-dev libfreetype6 libfreetype6-dev libfontconfig1 libfontconfig1-dev
• Download the PhantomJS binary file from its official website with wget https://bitbucket.org/ariya/phantomjs/downloads/phantomjs-2.1.1-linux-x86_64.tar.bz2
• Extract the file to /usr/local/share/ with sudo tar xvjf phantomjs-2.1.1-linux-x86_64.tar.bz2 -C /usr/local/share/
• Create a symbolic link to the binary file with sudo ln -sf /usr/local/share/phantomjs-2.1.1-linux-x86_64/bin/phantomjs /usr/local/bin
• Verify the installation with phantomjs --version