The Linux kernel is the foundational layer between your hardware and every process running on your system. It manages CPU scheduling, memory allocation, device drivers, system calls, and security enforcement. Keeping it current is not optional for production systems — outdated kernels expose servers to privilege escalation exploits, memory corruption vulnerabilities, and performance regressions that […]

Deleting files in Linux means permanently removing them from the filesystem with no native recycle bin or undo mechanism. The core tool for this operation is the rm command, supplemented by find, rsync, and shell glob expansion — each suited to different scenarios ranging from single-file removal to bulk, criteria-based cleanup across millions of inodes. […]

Linux does not natively expose file birth time through most standard user-space tools, but the underlying data often exists — the challenge is knowing exactly where to look and which filesystem and kernel version you are running. On ext4, btrfs, xfs, and tmpfs filesystems with Linux kernel 4.11+, true birth timestamps (crtime) are stored in […]

Process starvation occurs when a process is indefinitely denied the CPU time, memory, or I/O bandwidth it needs to make progress — not because the resources do not exist, but because the scheduling policy consistently favors other processes. Unlike deadlock, where all competing processes are blocked, starvation allows the system to appear functional while silently […]

XRDP is an open-source implementation of Microsoft's Remote Desktop Protocol (RDP) server for Linux. It enables any RDP-compatible client — including Windows Remote Desktop Connection, Remmina, and FreeRDP — to establish a full graphical desktop session on a remote Linux machine. On Ubuntu 22.04, XRDP acts as a bridge between the RDP client and an […]

The HTTP 413 Request Entity Too Large error is a server-side response status code that occurs when an incoming request body — most commonly a file upload — exceeds the maximum payload size configured at the web server, reverse proxy, or application layer. The server actively rejects the request before processing it, returning a 413 […]

PHP 8.3 is a major minor release of the PHP language that delivers significant improvements to the JIT compiler, type system, readonly properties, and core array/string functions. Released on November 23, 2023, it introduces typed class constants, json_validate(), array_is_list() refinements, Randomizer additions, and deep-cloning of readonly properties — changes that directly affect application performance, code […]

Adding a domain to cPanel means registering an additional domain name within your hosting control panel so that the server knows where to route incoming requests and where to serve files from. In cPanel, this is handled through the Domains or Addon Domains interface, which creates a dedicated document root directory, configures the virtual host […]

Bring Your Own IP (BYOIP) is the practice of announcing a block of IP addresses you own — registered under your organization in a Regional Internet Registry (RIR) such as RIPE NCC — through a third-party network provider's BGP infrastructure. AlexHost enables this on its own autonomous system, AS 200019, allowing you to use your […]

The sudo command — short for superuser do — grants authorized Linux users temporary root-level privileges to execute administrative tasks. By default, every sudo invocation requires password authentication to verify the caller's identity. You can disable this password prompt either globally for a user, selectively for specific commands, or temporarily for a session by modifying […]