The "Server IP address could not be found" error means your browser submitted a DNS query for a domain name and received no valid IP address in response — so no TCP connection was ever attempted. The root cause is almost always a failure somewhere in the DNS resolution chain: a stale local cache, a […]

Ubuntu's APT package management system is one of the most reliable in the Linux ecosystem, but it is not immune to failure. When `apt-get upgrade`, `apt-get dist-upgrade`, or `do-release-upgrade` throws an error, the root cause almost always falls into one of five categories: a stale or corrupted package index, unresolved dependency chains, a stale lock […]

smartctl is the primary command-line interface of the smartmontools package, designed to query, test, and interpret S.M.A.R.T. (Self-Monitoring, Analysis, and Reporting Technology) data embedded in the firmware of HDDs, SSDs, and NVMe drives. It communicates directly with drive firmware over ATA, SCSI, or NVMe interfaces to surface raw diagnostic telemetry that the operating system itself […]

The `/etc/hosts` file in Linux is a static lookup table that maps hostnames to IP addresses, processed by the operating system *before* any DNS query is sent. By adding or modifying entries in this file, you can override DNS resolution for specific domains on a per-machine basis — without touching your DNS server, router, or […]

A LAMP stack is a proven open-source software bundle consisting of Linux (operating system), Apache (web server), MySQL (relational database), and PHP (server-side scripting language). Together, these four layers form a complete, self-contained environment for building, deploying, and serving dynamic web applications. The acronym describes both the technology stack and the sequential request-processing pipeline each […]

In the digital realm, safeguarding your infrastructure begins with a robust hosting solution. AlexHost offers Dedicated Servers equipped with cutting-edge security features, such as DDoS protection, data encryption, and regular backups. These features ensure your systems and sensitive data are shielded from evolving cyber threats, allowing you to focus on business growth while we secure […]

Windows log files are essential components of the operating system, acting as detailed records of various system events. These logs are crucial for troubleshooting errors, monitoring performance, and ensuring security. For system administrators and advanced users, understanding these logs can provide valuable insights into system operations, including detecting crashes, failed logins, or hardware issues. Types […]

Apache HTTP Server, often simply called Apache, is a leading web server software used globally. Identifying the version of Apache running on your Linux VPS is crucial for ensuring security, compatibility, and optimal performance. This guide will detail various methods to ascertain the Apache version installed on your system. Why It's Important to Know Your […]

Enabling root login via SSH on Ubuntu is generally discouraged due to security concerns, as the root account has unrestricted access to the system. However, for certain administrative tasks or troubleshooting, it may become necessary. This guide will walk you through the process of enabling root login over SSH on Ubuntu, along with essential security […]

CentOS 7, renowned for its stability and reliability, is a preferred choice for server environments. However, it ships with Python 2.x by default, which is outdated for many modern applications that require Python 3. This guide provides a step-by-step process to install Python 3 on CentOS 7, ensuring your system is equipped to handle contemporary […]