Tech Docs
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The top command in Linux provides real-time monitoring of system processes, resource usage, and performance metrics directly from the terminal. It dynamically displays essential information, including CPU utilization, memory consumption, swap usage, and running tasks. The interactive output updates automatically, offering an immediate overview of the system’s operational state, making it invaluable for troubleshooting, performance…
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A Canaan Bitcoin miner experienced a power supply unit (PSU) failure, leading to significant damage. An analysis suggests two primary causes: inadequate power delivery from an extension cord and the use of a non-compliant USB-C cable. Theory 1: Inadequate Power Delivery from Extension Cord The PSU was connected via an extension cord, which may not…
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Industrial-grade Bitcoin mining machines require robust and efficient power supplies to convert alternating current (AC) from the grid into the direct current (DC) necessary for their operation. Selecting the appropriate AC to DC power supply is crucial for optimal performance and longevity of the mining equipment. Power Requirements and Efficiency Each mining machine model has…
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POP3 (Post Office Protocol version 3) is an email retrieval protocol that allows a client to download messages from a mail server to a local device. Operating over TCP port 110 (or 995 with SSL/TLS), POP3 typically downloads and then deletes messages from the server unless configured otherwise. It is ideal for users who want…
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HDMI (High-Definition Multimedia Interface) and DisplayPort are two widely adopted digital display interfaces, but they are optimized for different environments. HDMI is the standard for consumer electronics, including TVs, projectors, game consoles, and media players. It supports both audio and video in a single cable and includes features like CEC (Consumer Electronics Control) and ARC…
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SSD (Solid-State Drive) and eMMC (embedded Multi Media Card) are both forms of flash memory, but they differ significantly in performance, upgradability, and use cases. SSDs are standalone storage devices used in laptops, desktops, and servers, often connected via SATA, PCIe, or NVMe interfaces. They offer high read/write speeds, long lifespan, and come in capacities…
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Esptool.py is a Python-based utility created by Espressif for flashing firmware onto ESP8266 and ESP32 chips. It operates cross-platform—working on Windows, Linux, and macOS—and is executed from the command line using Python. Although its name ends in .py, users interact with it using simple terminal commands, not actual Python code. The command-line arguments passed to…
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BIOS (Basic Input/Output System) and CMOS (Complementary Metal-Oxide Semiconductor) are closely related components in PC architecture, but they serve distinct functions. BIOS is firmware stored on a chip on the motherboard, responsible for initializing hardware during boot-up, performing POST (Power-On Self-Test), and launching the operating system. It also provides a configuration interface where users can…
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PCI Express (PCIe) is the industry-standard high-speed interface used to connect add-on components—like network interface cards (NICs)—to a computer’s motherboard. For NICs, PCIe offers dedicated data lanes to the CPU or chipset, ensuring low-latency, high-throughput, and scalable bandwidth. PCIe slots are designated by their lane count: x1, x4, x8, and x16. Each lane consists of…
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NVMe (Non-Volatile Memory Express) and SATA (Serial ATA) are two types of interfaces used to connect SSDs to a system, and while both offer significant advantages over traditional HDDs, their performance differences are critical. SATA SSDs, which use the older AHCI protocol and connect via the SATA III interface, typically max out at 550 MB/s…
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LCD (Liquid Crystal Display) and OLED (Organic Light Emitting Diode) technologies are two widely used screen types in modern devices, each with distinct characteristics. LCDs require a backlight to illuminate pixels, which means blacks can appear grayish, but they offer consistent brightness and are generally more affordable. OLED displays, on the other hand, emit their…
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Wi-Fi 5 (802.11ac) and Wi-Fi 6 (802.11ax) are two prevalent standards that IT professionals should be familiar with. Wi-Fi 5 (802.11ac): Wi-Fi 5, introduced in 2013, operates exclusively on the 5 GHz frequency band. It brought significant improvements over its predecessor, 802.11n, by offering higher data rates and enhanced performance. The standard supports channel widths…
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