Knowledge Base

Understanding what is prohibited on a virtual private server is not just a matter of reading fine print — it directly determines whether your infrastructure stays online, your IP reputation remains clean, and your account avoids immediate termination. AlexHost enforces…

The mv command in Linux moves or renames files and directories by updating filesystem metadata — specifically the directory entry — without copying data when operating within the same filesystem. This makes it an atomic, near-instantaneous operation for same-partition moves,…

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 —…

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…

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,…

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,…

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…

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,…

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,…

Transferring a domain name to a new registrar is one of the most consequential administrative tasks a website owner or systems administrator performs. Done correctly, it is seamless and causes zero downtime. Done incorrectly, it can result in DNS propagation…