Tech Docs
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RAID, or Redundant Array of Independent Disks, is a method of combining multiple physical drives into a single logical unit to improve performance, redundancy, or both. It’s commonly used in servers, NAS devices, and business-class desktops to ensure data reliability and uptime. Different RAID levels offer different trade-offs between speed, fault tolerance, and capacity. RAID…
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C++ is not just a programming language. It is a system-building tool forged from necessity, optimized for control, and wielded by those who require deterministic performance across both time and space. Conceived in 1979 by Danish computer scientist Bjarne Stroustrup at Bell Labs, C++ was born out of a need to create simulations with both…
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LDAP (Lightweight Directory Access Protocol) is an open, vendor-neutral protocol used to access and maintain distributed directory information services over an Internet Protocol (IP) network. LDAP is widely used for storing and managing information about users, groups, computers, and other resources in a centralized database, known as a directory. The protocol allows clients to connect…
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In modern computing, Solid State Drives (SSDs) have largely replaced traditional spinning hard drives due to their superior speed and reliability. Among SSD types, two interfaces dominate: SATA SSDs and NVMe SSDs. Both offer fast performance compared to HDDs, but the underlying technology and connection methods set them apart significantly. SATA SSDs use the Serial…
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When a Linux machine starts feeling slower than normal, it’s often a sign that system resources are strained. In this case, the user decided to troubleshoot by checking memory usage and cleaning up unused files. After running the free command to get a snapshot of RAM and swap usage, they used find to delete all…
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To set up logical volume management in Linux, the first step is creating a physical volume (PV). A physical volume is typically a disk partition (like /dev/sdb1) that is initialized for use by the Logical Volume Manager. This is done using the pvcreate command, which prepares the partition to be added into a volume group.…
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eMMC (embedded MultiMediaCard) and UFS (Universal Flash Storage) are two types of embedded storage used in smartphones, tablets, and entry-level laptops. eMMC integrates flash memory and a controller into a single package, functioning similarly to an SD card. It’s affordable, compact, and easy to implement, making it common in budget devices. However, eMMC operates on…
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What Is a Docking Station? A docking station is a physical expansion unit that connects to a laptop and transforms it into a full desktop workstation. It adds additional ports such as USB, Ethernet, HDMI, DisplayPort, audio jacks, and charging capabilities, often through a single USB-C or proprietary connector. Docking stations typically: Used in corporate…
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The IMEI (International Mobile Equipment Identity) is a unique 15-digit number assigned to every mobile device that connects to a cellular network. Unlike a SIM card, which identifies the user, the IMEI identifies the device itself. It is used by carriers to track stolen devices, block lost phones from network access, and enforce blacklists. IMEI…
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A swap file in Linux is a special file on the disk that acts as virtual memory when the system’s physical RAM becomes full. Instead of immediately failing or killing processes when memory runs low, the kernel moves less-used data from RAM into the swap file to free up space for active applications. This ensures…
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In Linux, mount refers to the process of attaching a storage device or partition—such as a hard drive, USB stick, or network share—to the system’s directory tree so that its contents become accessible. Unlike operating systems that assign drive letters, Linux integrates storage into a single hierarchical file system. When a device is mounted, it…
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Creating a filesystem means formatting a partition or volume with a specific structure that the operating system can understand—such as ext2, ext3, ext4, xfs, or fat32. This is often done on a new partition using the mkfs (make filesystem) family of commands. For example, formatting a device with ext4 can be done with: sudo mkfs.ext4…
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