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Headless computer
Headless computer
Headless computer
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A headless computer is a computer system or device that has been configured to operate without a monitor (the missing "head"), keyboard, and mouse. A headless system is typically controlled over a network connection, although some headless system devices require a serial connection to be made over RS-232 for administration of the device. Headless operation of a server is typically employed to reduce operating costs.

PC BIOS limitations

[edit]

During bootup, some (especially older) PC BIOS versions will wait indefinitely for a user to press a key before proceeding. If some basic device, such as a video card or keyboard, are not installed or connected, this could effectively halt an unattended system.

On more modern systems, the BIOS factory setting will typically be configured to behave this way as well, but this setting can be changed with a BIOS setup utility to proceed without user intervention.

Even in cases where a system has been set up to be managed remotely, a local keyboard and video card may still be needed from time to time; for example, to diagnose boot problems that occur before a remote access application is initialized.

Hardware remote control

[edit]

Some servers provide for remote control with an internal network card and hardware that mirrors the console screen. For example, HP offers a system called Integrated Lights-Out (iLO) that provides this function.[1] Remote access to the system is gained using a secure web connection to an IP address assigned to the iLO adapter, and allows for monitoring of the system during start-up, before the operating system is loaded.

Another hardware solution is to use a KVM-over-IP switch. Such a switch is a traditional Keyboard-Video-Mouse device with the added ability to provide remote control sessions over IP.[2] Connection to the KVM device is gained using a web browser, which allows for remote monitoring of the connected system console port.

Software remote control

[edit]
A physical terminal (DEC VT100)
A virtual terminal (gnome-terminal)

Administration of a headless system typically takes place with a text-based interface such as a command line in Unix or in Linux. These interfaces, often called "virtual terminals" or "terminal emulators", attempt to simulate the behavior of "real" interface terminals like the Digital Equipment Corporation's VT100, but over networks, usually using protocols such as Secure Shell.

One can also use systems such as X Window System and VNC combined with virtual display drivers - this setup allows remote connections to headless machines through ordinary graphical user interfaces, often running over network protocols like TCP/IP.

See also

[edit]

References

[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Headless computer

View on Grokipedia
from Grokipedia
A headless computer is a system or device configured to operate without a local or peripherals, such as a monitor (the "head"), keyboard, or —the term "headless" refers to the absence of a monitor, often called the "head" in contexts—relying instead on remote access for control and . These s are prevalent in modern data centers, where most servers are designed as headless to optimize space and resources, as well as in embedded applications like routers, set-top boxes, and (IoT) devices. Headless computers are typically managed through network-based protocols and tools, including (SSH) for command-line access, (RDP) for graphical remote sessions, or automation frameworks like , , , Terraform, Docker, and . They often incorporate hardware features such as the (PXE) for and out-of-band management solutions like Hewlett-Packard's Integrated Lights-Out (iLO) to enable remote power control, firmware updates, and diagnostics without local intervention. This architecture eliminates the need for an integrated (GPU), further reducing hardware complexity. The primary advantages of headless computers include significant cost savings by omitting peripherals and display hardware, higher rack density in server farms for improved , and enhanced energy efficiency due to the absence of a (GUI), which conserves CPU and RAM for core tasks like hosting services or media streaming. They also promote longevity through simplified maintenance and bolster security by minimizing local access points, making unauthorized physical intrusions more difficult. However, disadvantages encompass reduced user-friendliness, as operation demands familiarity with command-line interfaces and remote tools, limiting accessibility for non-technical users and posing challenges during network outages when local troubleshooting becomes impractical. Additionally, headless setups are best suited for backend or automated roles with minimal direct interaction, rather than interactive desktop environments.

Overview

Definition and Characteristics

A headless computer is a system configured to operate without local peripherals such as a monitor, keyboard, or mouse, depending instead on network-based remote access for all user interaction and control. This setup eliminates the need for direct physical connections to input/output devices, allowing the computer to function in environments where local interfaces are unnecessary or impractical. Key characteristics of headless computers include minimalist hardware , often omitting display outputs, integrated , or USB ports dedicated to human-machine interfaces (HMI) to reduce and power usage. They prioritize robust network interfaces for remote management and typically run via command-line interfaces or protocols enabling remote graphical access, such as SSH for text-based control. These systems are prevalent in resource-constrained settings, including embedded devices and data centers, where the focus is on computational efficiency without local visualization. Headless computers differ from thin clients, which feature minimal local processing and a basic interface solely for connecting to a remote server, as headless systems handle full local computation but provide no local whatsoever. Unlike traditional desktop setups that necessitate attached peripherals for direct operation, headless configurations are inherently designed for unattended, remote-only use. Representative examples include single-board computers like the set up for headless operation via preconfigured SSH and network settings, bypassing connectivity entirely, or embedded server boards such as VersaLogic's Tomcat, which lack display ports to suit remote applications in metering or medical systems.

Historical Development

The concept of headless computing originated in the and 1970s alongside mainframe computers, where large central systems processed data without integrated displays, relying instead on remote "dumb" terminals for user interaction. These terminals, such as the Sperry UNIVAC Uniscope 300 (1964) and Lear Siegler (1976), connected via serial lines to mainframes like 's System/360 series, enabling multiple users to access the host computer's resources without local graphics or processing capabilities. By the late , had established dominance in this model, with mainframes serving as shared computing hubs accessed through basic text-based terminals that lacked standalone functionality. During the 1980s and 1990s, headless computing expanded with the adoption of Unix-based servers in networked environments, driven by precursors to the modern internet like , which transitioned into broader TCP/IP infrastructure by the late 1980s. Unix systems, evolving from their 1969 roots into multi-user server platforms by the 1980s, typically operated without local peripherals, using serial interfaces for console access and remote administration in client-server architectures. A pivotal advancement came in 1995 with the release of the SSH protocol by Tatu Ylönen, which introduced encrypted remote logins to Unix and other servers, replacing vulnerable protocols like and solidifying secure headless management. The 2000s marked a period of standardization and scale-up for headless systems, fueled by the dot-com boom's surge in server farms during the late 1990s and early , which built out vast data centers to support web hosting and . Blade servers and rack-mounted hardware proliferated in these facilities, optimizing space and power for headless operation. Key to this era was the 1998 announcement of the (IPMI) by , HP, , and , which defined hardware-level standards for remote monitoring, control, and recovery of servers independent of their operating systems. From the 2010s to 2025, headless computing integrated deeply into , IoT, and edge paradigms, with launching Elastic Compute Cloud (EC2) instances in August 2006 to offer scalable, virtualized headless servers accessible via APIs. The , introduced in 2012, accelerated adoption in resource-constrained environments like IoT devices and edge nodes, where setups without monitors or keyboards became standard for remote deployment in distributed systems. This period also saw a transition from legacy to firmware, starting with the Unified EFI Forum's 2005 specification, enhancing headless reliability through faster boot processes, network-based provisioning, and better without display dependencies.

Benefits and Challenges

Advantages

Headless computers offer substantial cost reductions by eliminating the need for peripherals such as monitors, keyboards, and mice, which lowers both initial procurement expenses and ongoing maintenance costs associated with these components. They require less physical space for deployments in constrained settings like data centers or embedded systems. This streamlined approach to hardware provisioning contributes to overall operational savings, particularly in large-scale installations where traditional setups would incur higher infrastructure demands. In terms of power and resource efficiency, headless systems consume less energy by forgoing display hardware and GUI processes, resulting in reduced heat generation and cooling requirements, especially in rack-mounted server configurations. For instance, headless single-board computers can achieve typical power consumption as low as 3W, compared to 7W for equivalent systems with display outputs, demonstrating significant savings in low-power applications. Broader studies on data center efficiency from the 2010s indicate that such optimizations helped limit electricity consumption growth to just 4% between 2010 and 2014, despite server shipment growth of approximately 3% annually. Scalability is enhanced with headless computers, as they facilitate easier deployment in clusters or data centers without the complication of individual local interfaces, allowing for seamless replication and integration into cloud environments. This design supports rapid expansion of computing resources based on demand, enabling organizations to scale backend operations efficiently while maintaining centralized control. Headless systems also provide enhanced reliability by minimizing local failure points, such as wear on keyboards or mice, and enabling centralized management that simplifies software updates and monitoring across multiple units. Their focus on backend processes without GUI overhead ensures consistent performance in continuous operations, reducing downtime risks in demanding environments.

Disadvantages and Limitations

Setting up a headless computer typically involves initial challenges, as operating system installation and tweaks often require pre-configuration via network-based methods or the temporary connection of peripherals such as a monitor, keyboard, and . For instance, graphical installers may necessitate local input devices unless a remote or automated network installation is employed. BIOS and firmware configurations present significant hurdles in legacy systems predating UEFI, where the boot process may halt without detecting a keyboard or video output, requiring workarounds like hardware jumper adjustments or USB device emulators to simulate peripherals. UEFI firmware, standardized in 2005, addresses many of these boot interruptions by supporting more flexible initialization but still demands explicit enablement of headless modes in certain enterprise setups, such as Dell's iDRAC interface. Troubleshooting headless systems is complicated by the absence of local diagnostics; for example, (POST) errors cannot be directly observed without peripherals, and reliance on network connectivity risks complete isolation during outages or failures. Hardware tools can partially alleviate BIOS-related boot issues, though they do not eliminate the need for initial configuration. Security vulnerabilities are heightened in headless environments due to dependence on remote access protocols, where misconfigurations—such as weak or default SSH keys—can expose the system to unauthorized entry and exploitation. Finally, employing remote graphical interfaces like VNC incurs performance penalties, including noticeable latency from the overhead of capturing, compressing, and transmitting screen updates over the network, which degrades compared to direct local interaction.

Technical Implementation

Hardware Considerations

Headless computers prioritize hardware configurations that eliminate the need for local devices, focusing instead on reliability, remote manageability, and in environments like data centers or embedded systems. Essential components include robust network interfaces to enable remote access and control, such as dual ports commonly integrated on server-grade motherboards for and high-throughput data transfer. Video output hardware is typically optional or entirely absent, as headless systems do not require graphical units (GPUs) or integrated graphics, reducing power consumption and physical footprint while avoiding unnecessary costs for components that serve no function in remote operation. USB ports are often minimized to essential maintenance functions, limiting exposure points and simplifying the design. Motherboard and chipset selection is critical for headless operation, favoring server-grade boards equipped with features like Integrated Dell Remote Access Controller (iDRAC) or equivalent baseboard management controllers (BMCs) that provide out-of-band management independent of the main CPU. Server-grade motherboards often support booting without attached peripherals through BIOS options, while some consumer boards may require adjustments to avoid halting on missing devices. Enterprise chipsets supporting standards like Intel's Xeon or AMD's EPYC processors ensure compatibility with headless modes, often incorporating dedicated management Ethernet ports separate from the primary network interfaces. Power supply units (PSUs) in headless systems emphasize high efficiency ratings, such as Platinum or , to minimize energy waste in always-on deployments, with modular cabling for optimized airflow in dense rack configurations. Cooling solutions lean toward efficient active systems with redundant fans or, in low-power scenarios, passive heatsinks that rely on airflow, particularly suited for rack environments where ambient are controlled. Remote power cycling is facilitated through smart power distribution units (PDUs) or BMC-integrated controls, allowing administrators to systems without physical intervention. Peripherals are largely avoided post-setup, with initial configuration relying on serial console ports or USB media for updates, while BMC chips handle ongoing monitoring of , voltage, and fan speeds. Firmware compatibility ensures reliable booting without peripherals, achieved through or settings that disable checks for keyboards, mice, or displays—such as enabling "Headless Mode" in the configuration to suppress error prompts during POST. settings can further configure the system to ignore missing devices, preventing boot loops in environments lacking local hardware. Representative examples include Supermicro's X11 series s, which integrate IPMI 2.0 for headless management and support booting without video outputs via dedicated options. Similarly, Pro WS series server boards offer headless operation through features that enable booting without attached devices, ideal for rackmount deployments.

Software Configuration

Configuring the is a critical initial step in enabling headless operation, as it ensures the system s automatically without requiring local peripherals. In the or setup, accessed typically by pressing a key like F2 or during power-on, users should disable options that halt on errors, such as "Halt on All Errors" or "Prompt on Warnings and Errors," setting them to "Continue" or "No" to prevent stops due to missing keyboard, , or display. Additionally, enabling network via PXE () involves navigating to the Boot Sequence menu, prioritizing the network adapter, and activating the UEFI Network Stack in Advanced Boot Options to allow remote OS loading over the network. Operating system installation for headless systems typically relies on remote methods to avoid local input devices. For , headless operation is supported via installation, which excludes the GUI by default. Installation can be performed unattended using an autounattend.xml file on boot media for automated setup, or remotely via (WDS) or System Center Configuration Manager (SCCM). Post-installation, management uses remoting (Enable-PSRemoting) or Remote Desktop for administration without local GUI. For Debian, netboot installation uses the minimal ISO downloaded from official mirrors, booted via PXE or USB, where selecting the "network-console" option during the installer prompts enables SSH access to the installer process at the assigned IP address, allowing completion without peripherals; the default credentials are username "installer" and password "r00tme" (which can be changed or disabled via preseed configuration). Similarly, Ubuntu Server supports headless setup through its autoinstall feature, where boot parameters like "ds=nocloud;s=/cdrom/nocloud/ autoinstall" are appended to the GRUB linux line on the installation media, enabling SSH connection to "installer@" post-boot for guided remote configuration after setting authentication in the user-data file. Recommended distributions include Ubuntu Server or Debian minimal installs, which exclude GUI packages by default, ensuring a lightweight, console-only environment suitable for headless use; CentOS Stream or alternatives like Rocky Linux offer comparable server editions without desktop components. After installation, post-configuration optimizes the for remote-only access by minimizing local dependencies. Disabling display managers and Xorg, if inadvertently installed, involves running sudo systemctl set-default multi-user.target to boot into console mode, followed by sudo apt remove xserver-xorg to unnecessary graphics components, as headless systems do not require graphical interfaces. Auto-login for remote sessions can be configured via tools like raspi-config on compatible systems or by editing /etc/[systemd](/page/Systemd)/system/[email protected]/override.conf to set ExecStart=-/sbin/agetty --autologin <username> --noclear %I $TERM, though this is optional for SSH-focused setups. Driver and service management further streamlines headless operation by focusing on essential, non-graphical components. Headless-compatible drivers for network and storage are automatically handled by the kernel in server distributions, with no need for GPU drivers since no display output is required; for instance, integrated or discrete graphics can be ignored or blacklisted via kernel parameters like nomodeset if they cause boot issues. Configuring the SSH daemon for boot involves installing openssh-server if not present (sudo apt install openssh-server), then enabling and starting it with sudo systemctl enable --now ssh to ensure it launches automatically on startup, providing persistent remote access. Automation tools like facilitate scalable configuration for single or fleet headless systems. Ansible playbooks can remotely provision SSH access, update packages, and tweak services via an file listing target IPs, executed from a control node with commands like ansible-playbook -i inventory setup.yml, where the playbook includes tasks such as installing openssh-server and enabling it. A specific example for systems involves adjusting GRUB for verbose output during in headless environments. Edit /etc/default/grub to modify GRUB_CMDLINE_LINUX_DEFAULT by removing "quiet splash" (e.g., changing it to GRUB_CMDLINE_LINUX_DEFAULT="debian-installer=en_US"), then run sudo [update-grub](/page/Sudo) to regenerate the configuration and apply the changes, revealing messages over the network console if needed.

Remote Access Methods

Hardware-Based Remote Control

Hardware-based remote control utilizes dedicated hardware components embedded in or connected to the system, enabling management of headless computers independently of the operating system for access. These solutions provide essential functions such as , hardware monitoring, and console redirection, ensuring administrators can intervene at the or level without physical presence or a running OS. The (IPMI), an open-standard specification first released in version 1.0 on September 16, 1998, serves as a foundational integrated management controller for access in servers and headless systems. IPMI enables features like remote —such as turning the system on or off—and sensor monitoring for environmental factors including , voltage, and fan speeds, all communicated via a message-based protocol between the baseboard management controller (BMC) and management software. IPMI version 2.0, released on February 12, 2004, enhanced remote capabilities by introducing the Remote Management Control Protocol (RMCP), a UDP-based encapsulation for IPMI messages that supports serial-over-LAN and remote event alerts for issues like hardware failures. This allows administrators to receive notifications and respond without OS involvement, improving reliability in headless environments. Vendor-specific implementations build on these standards with proprietary enhancements. Enterprise's Integrated Lights-Out (iLO), an embedded ASIC-based controller, offers web-based keyboard, video, and mouse (KVM) access along with virtual media support for mounting remote drives during boot processes in headless servers. 's Integrated Dell Remote Access Controller (iDRAC), integrated into servers, similarly provides secure web interfaces for KVM, , and media emulation, facilitating OS-independent management and updates. KVM-over-IP switches extend local console access over networks for multiple headless systems. Devices from Lantronix, such as the series, connect via USB or serial ports to deliver BIOS-level remote control and troubleshooting without software dependencies. Similarly, Avocent (now under ) KVM-over-IP appliances, like the AV3000 series, support consolidated access to up to 16 servers, enabling real-time video and input redirection for BIOS intervention and device administration. Serial console access, often via RS-232 ports or USB-to-serial adapters, provides a low-level, text-based interface for direct command-line interaction in headless and embedded systems. This method is particularly common in routers, industrial controllers, and servers lacking graphical outputs, allowing configuration, debugging, and recovery through simple terminal emulators. In headless setups, these hardware solutions offer key advantages, including persistent access during OS failures or crashes due to their out-of-band nature, and secure communication via HTTPS-encrypted interfaces to protect against unauthorized entry.

Software-Based Remote Control

Software-based remote control of headless computers utilizes operating system-dependent protocols and tools to facilitate remote interaction once the system is booted and connected to a network. These approaches enable administrators to manage systems without physical access, focusing on command execution, , and graphical interface forwarding through software layers. Text-based access is commonly provided by the (SSH) protocol, originally developed in 1995 by Tatu Ylönen at the to address the security shortcomings of earlier remote login methods. SSH establishes an encrypted channel for secure command-line control, supporting authentication via passwords or public keys and enabling tasks such as remote command execution and secure file transfers via SFTP or SCP. In contrast, , standardized in RFC 854 in 1983, offers unencrypted text-based remote access but is considered legacy and insecure due to its transmission of credentials and data in plaintext, rendering it obsolete for production environments. For low-level access, serial over IP tools like ser2net convert serial console output to TCP/IP streams, allowing remote monitoring of boot processes or kernel debugging on headless devices. Graphical remote desktop protocols extend control to full user interfaces. Virtual Network Computing (VNC), invented in the mid-1990s at the Olivetti & Oracle Research Lab in , , transmits pixel-based screen updates over the network for cross-platform GUI access, supporting both viewing and input forwarding. The (RDP), introduced by in 1998 as part of Terminal Server Edition, optimizes graphical remote sessions for Windows environments by separating the from the server-side application execution. System management is enhanced by dedicated software tools. , an open-source configuration management platform released in 2005, automates infrastructure provisioning and maintenance on remote servers using a declarative to enforce desired states across multiple nodes. Similarly, , developed by Opscode (now Chef Software) and first released in 2009, employs Ruby-based "recipes" and cookbooks for procedural automation of software configurations on headless systems. Web-based consoles, such as for distributions, provide browser-accessible interfaces for tasks like user management, service monitoring, and log viewing without requiring additional client software. Multi-platform compatibility broadens accessibility. , an open-source implementation of an RDP server, enables non-Windows operating systems like to host RDP sessions, allowing Windows clients to connect seamlessly. Mobile applications from providers like support SSH, VNC, and RDP connections from and Android devices, facilitating on-the-go administration with touch-optimized interfaces. Security is integral to these protocols. SSH key-based authentication replaces password logins by generating asymmetric key pairs with the ssh-keygen command on the client—typically producing an RSA or Ed25519 private key and corresponding public key—then appending the public key to the server's ~/.ssh/authorized_keys file for passwordless verification. Additional protections include VPN tunneling, which encapsulates remote sessions within encrypted or tunnels to obscure traffic from intermediaries. Modern implementations incorporate TLS 1.3, standardized in RFC 8446 in 2018, to provide and efficient for protocols like RDP and web consoles. These methods depend on a operating configuration to reliable protocol operation.

Applications

In Server Environments

In data centers, headless computers predominate as rack-mounted servers, including dense systems, which support critical workloads such as web hosting and database operations. These configurations maximize space utilization and energy efficiency in enterprise environments, with servers integrating multiple compute nodes into a single chassis for streamlined cabling and cooling. is facilitated by orchestration platforms like , which deploy and scale containerized applications across clusters of these servers without requiring local intervention. Virtualization in server environments leverages headless hypervisors to host multiple virtual machines on shared hardware, eliminating the need for a local graphical interface. VMware ESXi, a type-1 bare-metal , installs directly on server and manages VMs remotely, optimizing resource allocation for enterprise-scale operations. Proxmox VE similarly supports headless deployment, providing open-source with features like and clustering, often used in cost-sensitive setups. Headless nodes form the core of clustering solutions for and compute-intensive tasks, enabling fault-tolerant distributed processing. In Hadoop ecosystems, clusters of such nodes handle analytics through redundant architectures, where multiple NameNodes ensure continuous operation via shared storage like NFS. For , MPI clusters deploy headless servers to execute demanding simulations in fields like scientific research, distributing workloads across nodes for enhanced performance and reliability. Management practices for these headless systems emphasize centralized tools to maintain oversight and perform maintenance remotely. Solutions like and aggregate metrics from servers, networks, and applications, alerting administrators to issues in real time across large infrastructures. Remote firmware updates are executed via integrated management controllers, such as Dell's iDRAC, which allow and component revisions without downtime or physical access. Hyperscale cloud providers exemplify the scale of headless server deployments, operating millions of instances to power global services. (AWS) maintains data centers capable of hosting up to 50,000 servers each, supporting compute, storage, and AI workloads for diverse customers. Google Cloud similarly relies on vast arrays of headless infrastructure to deliver low-latency services worldwide. These setups are sustained through remote access protocols that enable seamless administration.

In Embedded and IoT Systems

Headless computers play a pivotal role in embedded systems, where single-board computers (SBCs) like the and BeagleBone operate without displays, keyboards, or other peripherals to enable compact, efficient in devices such as and interactive kiosks. These systems typically run lightweight distributions on microcontrollers or SBCs, allowing for remote configuration and control via network interfaces, which minimizes physical and cost in space-constrained environments. For instance, the BeagleBone Black supports headless operation in embedded projects by booting directly into a minimal Debian-based OS, facilitating integration into industrial setups without user interfaces. In IoT deployments, headless computers form the backbone of nodes used in smart homes for and industrial settings for , relaying data through efficient protocols like , which is designed for low-bandwidth, high-latency connections in resource-constrained devices. 's publish-subscribe model enables these nodes to transmit data from —such as or motion detectors—to central hubs with minimal overhead, supporting scalable networks of thousands of devices. Raspberry Pi-based nodes, for example, are commonly deployed headless in agricultural IoT systems to collect data and forward it via brokers for real-time analysis. Customization is essential for headless embedded and IoT applications, often involving minimal operating systems built with the , an open-source framework that generates tailored images optimized for low power consumption by stripping unnecessary components like graphical interfaces. These builds can incorporate over-the-air (OTA) update mechanisms, allowing firmware upgrades without physical access, which is critical for distributed IoT fleets. The 's layer-based architecture ensures compatibility with various hardware. Practical examples include headless setups as media servers running Plex, where the device streams video content over the network without local peripherals, or as (NAS) systems using for in home networks. In a Plex configuration, the Pi handles and library management remotely via web interfaces, supporting multiple simultaneous streams on models like the Pi 4. Similarly, for NAS, headless Pis with external drives provide centralized storage accessible via Ethernet, often integrated into IoT ecosystems for automated backups. As of 2025, over 67 million units have been shipped, with a significant portion deployed headless in IoT and embedded contexts due to their affordability and versatility. Key challenges in these systems include battery life optimization, where techniques like dynamic voltage scaling and sleep modes in the OS kernel extend operation to years on coin-cell batteries, and seamless integration with edge gateways that aggregate data from multiple headless nodes before cloud transmission. Edge gateways, such as those based on Azure IoT , act as intermediaries to protocol-translate and preprocess data, reducing latency and bandwidth usage in industrial IoT setups. Addressing these requires careful hardware selection and software tuning to balance functionality with power constraints.

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  68. https://mqtt.org/
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  74. https://pimylifeup.com/raspberry-pi-plex-server/
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  76. https://investors.raspberrypi.com/
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  78. https://promwad.com/news/battery-life-optimization-iot
  79. https://learn.microsoft.com/en-us/azure/iot-edge/iot-edge-as-gateway
  80. https://www.advantech.com/en-us/products/industrial-iot-edge-gateway/sub_9a0cc561-8fc2-4e22-969c-9df90a3952b5
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