Smart Cities - Low Carbon Computing Future - Revision history

EdmondLascaris: /* What is Kolibri */

2024-12-28T01:42:49Z

What is Kolibri

← Older revision		Revision as of 01:42, 28 December 2024
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	Kolibri on a Raspberry Pi provides a powerful, affordable, and scalable way to deliver quality education anywhere.		Kolibri on a Raspberry Pi provides a powerful, affordable, and scalable way to deliver quality education anywhere.


			=Downloading content for Kolibri=

			The amount of content you need to download depends on the specific educational materials and subjects you wish to include. Kolibri allows you to selectively download content from Kolibri Studio or other repositories. Here are some general content sizes:
			* Basic Collections:
			* Khan Academy Lite: Approximately 30–50 GB for a full collection, but smaller subsets (e.g., Math for Grades 1–6) might only be a few GB.
			* CK-12 Foundation: Modules typically range from hundreds of MB to several GB.
			* PhET Simulations: A complete set might be around 1 GB.
			* Custom Downloads: Kolibri Studio allows you to choose specific topics, grades, or even individual resources. This can significantly reduce storage requirements if only targeted content is needed.

			==Storing Content on an External Storage Device==

			Kolibri can store its content on an external storage device, which is particularly useful for managing larger content libraries without overloading the Raspberry Pi’s SD card. Here’s how you can configure Kolibri to use external storage:

			Steps to Configure External Storage:
			* Attach the External Storage Device: Connect a USB drive or external hard drive to the Raspberry Pi.
			* Ensure it is formatted with a compatible file system (e.g., ext4, FAT32, or NTFS).
			* Find the Mount Path: Check the device’s mount path using:

			<syntaxhighlight lang="bash">
			lsblk
			</syntaxhighlight>

			* Example: /media/pi/your_drive_name.

			3. Stop Kolibri: Before changing the storage location, stop the Kolibri server:

			<syntaxhighlight lang="bash">
			kolibri stop
			</syntaxhighlight>

			4. Update Kolibri’s Configuration:
			* Edit the Kolibri options file:

			<syntaxhighlight lang="bash">
			sudo nano /home/pi/.kolibri/options.ini
			</syntaxhighlight>

			* Add or update the CONTENT_STORAGE_DIR parameter to point to the external storage location. For example:

			<syntaxhighlight lang="bash">
			[Paths]
			CONTENT_STORAGE_DIR = /media/pi/your_drive_name/kolibri_content
			</syntaxhighlight>

			5. Move Existing Content (if necessary):
			* If you’ve already downloaded content, move it to the new location:

			<syntaxhighlight lang="bash">
			mv /home/pi/.kolibri/content /media/pi/your_drive_name/kolibri_content
			</syntaxhighlight>

			6. Restart Kolibri: Start the Kolibri server again:

			<syntaxhighlight lang="bash">
			kolibri start
			</syntaxhighlight>

			Advantages of Using External Storage:
			* Scalability: Easily upgrade to larger drives as needed.
			* Performance: High-speed external drives can improve response times when serving content to multiple users.
			* Preservation: External storage can be moved between devices or used as a backup.

			By storing content on an external device, you ensure that the Raspberry Pi’s internal storage remains free for system operations while accommodating extensive educational materials.

EdmondLascaris: /* How to install LUbuntu on USB Memory Stick using Mac Terminal */

2024-12-28T01:36:03Z

How to install LUbuntu on USB Memory Stick using Mac Terminal

← Older revision		Revision as of 01:36, 28 December 2024
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	* Backup Data: Writing an image will erase all data on the USB drive. Ensure you’ve backed up any important files.		* Backup Data: Writing an image will erase all data on the USB drive. Ensure you’ve backed up any important files.
	* Mac Users with M1/M2 Chips: Bootable USBs can still be created using the same process, but installation on ARM laptops may require an ARM-compatible OS version.		* Mac Users with M1/M2 Chips: Bootable USBs can still be created using the same process, but installation on ARM laptops may require an ARM-compatible OS version.


			=What is Kolibri=

			Kolibri is an open-source educational platform developed by Learning Equality. It is designed to provide offline access to high-quality educational resources, making it particularly useful in areas with limited or no internet connectivity. Kolibri can host a variety of content, including interactive lessons, videos, quizzes, and textbooks, and is widely used in schools, community centers, and informal learning environments.

			==Key Features of Kolibri:==
			* Offline Access: Operates without the need for an active internet connection after the content has been downloaded.
			* Curated Content: Offers educational resources from renowned providers such as Khan Academy, CK-12, and PhET.
			* Multi-User Support: Provides role-based access for learners, educators, and administrators.
			* Customizable Lessons: Allows educators to create and assign lessons tailored to the needs of their students.
			* Analytics: Offers tools to track student progress and engagement.
			* Lightweight: Designed to run on low-powered devices, including the Raspberry Pi.

			==Using Kolibri on a Raspberry Pi==

			Kolibri is ideal for deployment on a Raspberry Pi, enabling it to act as a local server for offline educational access in classrooms or community learning centers.

			Requirements:
			* A Raspberry Pi 3, 4, or later (Raspberry Pi 4 is recommended for better performance).
			* A power supply and storage device (SD card or external storage) with at least 16GB capacity for content.
			* Optional: A Wi-Fi router to enable learners to connect to the Kolibri server on the Raspberry Pi.

			Steps to Install and Use Kolibri on Raspberry Pi:
			* Prepare the Raspberry Pi: Install a compatible operating system, such as Raspberry Pi OS.
			* Ensure the system is updated:

			<syntaxhighlight lang="bash">
			sudo apt update && sudo apt upgrade -y
			</syntaxhighlight>

			2. Install Kolibri:
			* Add the Learning Equality repository:

			<syntaxhighlight lang="bash">
			echo "deb [trusted=yes] https://learningequality.org/r/debian/ ./" \| sudo tee /etc/apt/sources.list.d/learningequality.list
			</syntaxhighlight>

			* Install Kolibri:

			<syntaxhighlight lang="bash">
			sudo apt update
			sudo apt install kolibri
			</syntaxhighlight>

			3. Start the Kolibri Server:
			* Launch Kolibri:

			<syntaxhighlight lang="bash">
			kolibri start
			</syntaxhighlight>

			* Access Kolibri in a browser by navigating to http://<Raspberry_Pi_IP_Address>:8080.

			==4. Download Content:==
			* Use the Kolibri interface to import educational content. This can be done from:
			* Kolibri Studio (online repository).
			* Local storage if content has been pre-downloaded.

			==5. Set Up the Learning Environment:==
			* Configure user roles for teachers and students.
			* Teachers can create lessons, assign resources, and monitor student progress.

			==6. Enable Offline Connectivity:==
			* If deploying in a classroom, connect the Raspberry Pi to a Wi-Fi router.
			* Learners can access Kolibri by connecting their devices to the same network and entering the Raspberry Pi’s IP address in a browser.

			==Use Cases:==
			* Schools in Remote Areas: Acts as a self-contained learning system where students and teachers access resources locally.
			* Libraries or Community Centers: Provides access to a wide array of educational materials to the public.
			* Disaster Recovery and Emergency Education: Serves as a portable, robust solution for education in emergencies.

			Kolibri on a Raspberry Pi provides a powerful, affordable, and scalable way to deliver quality education anywhere.

EdmondLascaris: /* Burn Disk ISO Image to USB Memory Stick */

2024-12-28T01:18:40Z

Burn Disk ISO Image to USB Memory Stick

← Older revision		Revision as of 01:18, 28 December 2024
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	This process ensures the ISO is properly burned and ready for use.		This process ensures the ISO is properly burned and ready for use.

			=Using Knoppix to Erase a Hard Drive on a Laptop=

			Using Knoppix or another Linux-based tool to securely erase a hard drive is an effective way to ensure that data cannot be recovered. Here’s a detailed guide:

			Steps to Securely Erase a Hard Drive Using Knoppix

			==1. Prepare Knoppix==
			* Download Knoppix: Download the Knoppix ISO file from the official website.
			* Create a Bootable USB/DVD:
			* Use tools like Rufus (Windows) or Etcher (Linux/Mac) to create a bootable USB stick or burn the ISO to a DVD.

			==2. Boot into Knoppix==
			* Insert the bootable USB/DVD into the laptop.
			* Restart the laptop and boot from the USB/DVD (change the boot order in the BIOS/UEFI if needed).
			* Select the default Knoppix Live mode to load the operating system.

			==3. Identify the Hard Drive==
			* Open a terminal in Knoppix.
			* List all storage devices using the command:

			<syntaxhighlight lang="bash">
			sudo fdisk -l
			</syntaxhighlight>

			* Note the identifier of the drive you want to erase (e.g., /dev/sda, /dev/sdb).

			==4. Securely Erase the Hard Drive==
			* Use one of the following tools/methods:

			===Method 1: Using dd Command===
			* Overwrite the entire drive with zeros:

			<syntaxhighlight lang="bash">
			sudo dd if=/dev/zero of=/dev/sdX bs=1M
			</syntaxhighlight>

			Replace sdX with the appropriate drive identifier (e.g., /dev/sda).
			* To overwrite with random data (stronger security):

			<syntaxhighlight lang="bash">
			sudo dd if=/dev/urandom of=/dev/sdX bs=1M
			</syntaxhighlight>

			* This process can take a while depending on the drive size.

			===Method 2: Using shred===
			* shred overwrites the disk multiple times with random data:

			<syntaxhighlight lang="bash">
			sudo shred -v -n 3 /dev/sdX
			</syntaxhighlight>

			* -v: Show progress.
			* -n 3: Overwrite the disk 3 times (you can increase the number for greater security).
			* sdX: Replace with your drive identifier.

			===Method 3: Using hdparm for Secure Erase===
			* If your hard drive supports Secure Erase (common in modern drives):

			1. Unlock the drive:

			<syntaxhighlight lang="bash">
			sudo hdparm --user-master u --security-set-pass password /dev/sdX
			</syntaxhighlight>

			2. Start the Secure Erase process:

			<syntaxhighlight lang="bash">
			sudo hdparm --user-master u --security-erase password /dev/sdX
			</syntaxhighlight>

			Replace password with a temporary password (e.g., “1234”) and sdX with your drive identifier.

			After Erasing the Drive verify the drive is empty by running:

			<syntaxhighlight lang="bash">
			sudo hexdump -C /dev/sdX \| head
			</syntaxhighlight>


			3. Shutdown Knoppix:
			* Safely power down the system:

			<syntaxhighlight lang="bash">
			sudo shutdown -h now
			</syntaxhighlight>

	=Low Carbon Computing=		=Low Carbon Computing=

EdmondLascaris: /* Lightweight Linux Distributions and Software */

2024-12-28T01:12:05Z

Lightweight Linux Distributions and Software

@@ Line 284: / Line 284: @@
 sudo dpkg-reconfigure libdvd-pkg
 </syntaxhighlight>
 =Low Carbon Computing=

EdmondLascaris: /* Student Project: Building a Low-Carbon, Low-Energy ICT Infrastructure for an Offline Future */

2024-12-27T05:05:26Z

Student Project: Building a Low-Carbon, Low-Energy ICT Infrastructure for an Offline Future

← Older revision		Revision as of 05:05, 27 December 2024
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			=ICT Infrastructure required for Off-Line Computing=

			If the internet and mobile phone communication were to go down for several years, ICT software and hardware could play a critical role in supporting community resilience by enabling local communication, resource management, education, and essential services. These tools would need to be designed for offline operation, energy efficiency, and decentralized use to meet the needs of isolated communities.

			Good Applications for ICT in a Long-Term Offline Scenario

			==1. Local Communication Systems==
			Mesh Networks:
			* Use devices like Raspberry Pi, ESP32, or smartphones to create a local wireless communication network.
			* Software: Mesh networking protocols like BATMAN, CJDNS, or LibreMesh.
			* Use Cases: Text messaging, file sharing, and emergency alerts within the community.

			Digital Radio Communication:
			* Leverage amateur radio or long-range radio protocols (e.g., LoRa) for low-bandwidth communication.
			* Software: FLDigi for text-based communication over radio waves.
			* Use Cases: Long-distance messaging, disaster coordination, and information exchange.

			==2. Resource Management and Distribution==
			Local Databases:
			* Use Raspberry Pi or similar devices to host offline databases for inventory, water usage, food distribution, and medical supplies.
			* Software: SQLite, Airtable (offline mode), or custom Python-based tools.
			* Use Cases: Track and manage resources, prevent shortages, and ensure equitable distribution.

			Energy Monitoring:
			* Deploy IoT devices to monitor and optimize renewable energy systems like solar panels or microgrids.
			* Software: Open-source platforms like Node-RED or Home Assistant.
			* Use Cases: Monitor battery levels, manage load balancing, and maximize efficiency of limited power supplies.

			==3. Education and Knowledge Sharing==
			Offline Content Servers:
			* Set up offline servers with educational content and community resources.
			* Software: Kolibri (educational content platform), Kiwix (offline Wikipedia), or MediaWiki for custom knowledge repositories.
			* Use Cases: Teach skills, provide technical manuals, and share local knowledge.

			Skill Training Simulations:
			* Use laptops or Raspberry Pi systems with offline tools for vocational training (e.g., farming, repair skills).
			* Software: Offline coding environments like Scratch or Geogebra for mathematics.

			==4. Health and Medical Support==
			Local Health Records:
			* Deploy local, encrypted health databases for tracking patient records and community health trends.
			* Software: OpenMRS (offline mode) or custom offline databases.
			* Use Cases: Manage vaccinations, track disease outbreaks, and prioritize medical resources.

			Diagnostic Tools:
			* Use portable medical devices with offline diagnostic software.
			* Hardware: Raspberry Pi or Arduino for simple health monitoring tools (e.g., heart rate monitors).
			* Use Cases: Provide basic diagnostics and monitor chronic conditions.

			==5. Local Governance and Decision-Making==
			Community Voting and Planning Systems:
			* Use Raspberry Pi to host local web apps for community decision-making and governance.
			* Software: Offline-capable platforms like Polls (Nextcloud app) or Etherpad for collaborative planning.
			* Use Cases: Organize meetings, vote on resource allocation, and track action plans.

			Mapping and GIS Tools:
			* Deploy offline geographic information systems (GIS) for land management and disaster response.
			* Software: QGIS (offline mode), OpenStreetMap (local instance).
			* Use Cases: Plan evacuation routes, allocate agricultural land, and monitor environmental changes.

			==6. Entertainment and Community Engagement==
			Offline Media Centers:
			* Host local servers with movies, music, and books for community entertainment.
			* Software: Plex, Jellyfin, or VLC for streaming and playback.
			* Use Cases: Provide recreation and maintain morale during extended isolation.

			Gaming Platforms:
			* Set up local multiplayer games or board game simulations for communal activities.
			* Software: LAN-based games or retro gaming emulators.

			==7. Disaster Preparedness and Recovery==
			Early Warning Systems:
			* Use sensors and IoT devices for monitoring weather, floods, or fires.
			* Hardware: LoRa-based sensors or Arduino weather stations.
			* Software: Custom Python scripts or tools like Grafana for visualizing sensor data.
			* Use Cases: Alert the community to imminent dangers and track environmental risks.

			Repair and Maintenance Manuals:
			* Host digital libraries of repair guides and engineering schematics.
			* Software: PDF repositories or offline Wikis with searchable content.
			* Use Cases: Enable DIY repairs for critical infrastructure like water pumps, vehicles, and electronics.

			==Recommended Hardware for Offline Resilience==
			* Raspberry Pi: Versatile for servers, communication hubs, or educational tools.
			* ESP32 or Arduino: Low-power IoT devices for sensors and local automation.
			* LoRa Modules: For long-range, low-bandwidth communication.
			* Solar-Powered Chargers: To ensure devices can operate without grid electricity.
			* External Storage: SSDs or hard drives for storing data, media, and software repositories.
			* Portable Laptops: Energy-efficient laptops for running software and performing tasks locally.

			==Core Principles for ICT Resilience==
			* Energy Efficiency: Design systems to operate on minimal power, prioritizing renewable energy.
			* Decentralization: Avoid single points of failure by distributing hardware and software systems.
			* Modularity and Repairability: Choose hardware and software that are easy to repair and upgrade locally.
			* Simplicity and Usability: Ensure tools are easy to use and require minimal technical expertise.
			* Scalability: Design systems to grow with the community’s needs, from a few users to a larger network.

			==Conclusion==

			ICT software and hardware can play a transformative role in supporting community resilience during prolonged internet and communication outages. By leveraging local networks, offline computing, and low-power devices, communities can sustain essential functions like communication, education, health, and resource management. Teaching these principles and deploying scalable systems will strengthen local resilience and self-reliance.


	=Student Project: Building a Low-Carbon, Low-Energy ICT Infrastructure for an Offline Future=		=Student Project: Building a Low-Carbon, Low-Energy ICT Infrastructure for an Offline Future=
	This project challenges students to design and implement an ICT infrastructure that functions efficiently without internet access, using Linux, old laptops, and Raspberry Pi devices. The project emphasizes sustainability, resourcefulness, and essential services for a community.		This project challenges students to design and implement an ICT infrastructure that functions efficiently without internet access, using Linux, old laptops, and Raspberry Pi devices. The project emphasizes sustainability, resourcefulness, and essential services for a community.

EdmondLascaris: /* Step 4: Write the Disk Image to the USB Drive */

2024-12-26T22:44:47Z

Step 4: Write the Disk Image to the USB Drive

← Older revision		Revision as of 22:44, 26 December 2024
Line 1,097:		Line 1,097:

	<syntaxhighlight lang="bash">		<syntaxhighlight lang="bash">
	sudo dd if=~Users/edmond/Downloads/lubuntu.iso of=/dev/rdiskN bs=1m		sudo dd if=/Users/edmond/Downloads/lubuntu.iso of=/dev/rdiskN bs=1m
	</syntaxhighlight>		</syntaxhighlight>

EdmondLascaris: /* How to install Evince from another computer on the same network */

2024-12-26T22:43:45Z

How to install Evince from another computer on the same network

Show changes

EdmondLascaris: /* How to install LUbuntu on USB Memory Stick using Mac Terminal */

2024-12-26T22:37:09Z

How to install LUbuntu on USB Memory Stick using Mac Terminal

@@ Line 897: / Line 897: @@
 * It allows APT to treat the directory /home/pi/local-repo as a package repository.
 * Packages from this directory can be installed using sudo apt install <package-name> after running sudo apt update.
 =How to install LUbuntu on USB Memory Stick using Mac Terminal=

EdmondLascaris: /* Setting Up Nextcloud on Raspberry Pi */

2024-12-26T22:35:09Z

Setting Up Nextcloud on Raspberry Pi

@@ Line 396: / Line 396: @@
 By setting up a Raspberry Pi as a DHCP and DNS server, communities can create robust, low-carbon networks that provide critical services locally. This approach not only reduces energy consumption but also builds resilience and independence, ensuring ICT resources remain accessible in challenging scenarios.
 =Setting Up Nextcloud on Raspberry Pi=
@@ Line 511: / Line 640: @@
 * Connect to your server using its local IP.
 * Sync files across devices.
 =How to Install AbiWord using Offline Resources=

EdmondLascaris: /* Installing and Removing Software using Terminal */

2024-12-26T22:27:07Z

Installing and Removing Software using Terminal

@@ Line 130: / Line 130: @@
 This project not only teaches technical skills but also fosters creativity, problem-solving, and an understanding of sustainable practices in ICT. It prepares students to think critically about how technology can serve communities under resource-constrained conditions.
 =Installing and Removing Software using Terminal=
@@ Line 183: / Line 280: @@
 * Customizability: Advanced options like installing specific versions or debugging are easier via the terminal.
 * Lubuntu’s terminal-based software installation method is identical to other Ubuntu flavors, making it straightforward and efficient.
 =DHCP and DNS Server for Low Carbon Future =