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Operating System Articles
Page 145 of 171
How To Enable SELinux In CentOS/RHEL 7?
SELinux (Security-Enhanced Linux) is a mandatory access control (MAC) security mechanism that provides an additional layer of security to the Linux kernel. By default, SELinux is enabled in CentOS/RHEL 7, but it runs in permissive mode, which means it logs security violations without blocking them. What is SELinux? SELinux is a security module developed by the NSA in partnership with Red Hat that enforces policies governing what actions processes and users can perform on the system. It uses predefined labels assigned to resources such as files, directories, sockets, and devices to define security contexts and control access. ...
Read MoreHow to Enable SSH on Debian 9 or 10?
SSH (Secure Shell) is a network protocol that enables secure communication between two systems. It establishes an encrypted connection to a remote server over unsecured networks like the internet, making it ideal for remote administration and file transfers. Unlike protocols such as Telnet or FTP, SSH encrypts all data transmission, preventing third-party interception. Importance of Enabling SSH on Debian 9 or 10 Enabling SSH on your Debian system provides crucial remote administration capabilities. System administrators can manage multiple servers from different locations without physical presence at each machine. This remote access minimizes infrastructure-related downtime by allowing quick issue ...
Read MoreHow to Enable SSH on Raspberry Pi {Linux, Mac OS, Windows}?
The Raspberry Pi is a popular, credit-card sized computer that can be used for various purposes such as media center, gaming console, and even as a web server. These devices run on different operating systems such as Raspbian (a version of Debian Linux), Windows 10 IoT Core, and Ubuntu among others. One of the key functionalities provided by these devices is the ability to connect remotely via Secure Shell (SSH). What is SSH? SSH (Secure Shell) is a network protocol that allows users to securely access remote computers over an unsecured network. It uses encryption to protect all ...
Read MoreHow to Enable SSH on Ubuntu?
Secure Shell (SSH) is a cryptographic network protocol that allows secure remote access to a computer or server over an unsecured network. It provides a secure and encrypted channel between two devices for running commands remotely or securely transferring files. SSH was designed to replace Telnet, FTP, and Rlogin, which transmit plain text data and are easily intercepted by attackers. SSH is an essential tool for system administrators, developers, and users who need secure remote server access. Checking if SSH is Installed on Ubuntu Before enabling SSH on Ubuntu, check whether OpenSSH server is already installed. You ...
Read MoreHow to Enable TLS 1.3 in Apache and Nginx?
Transport Layer Security (TLS) 1.3 is the latest version of the TLS protocol, offering enhanced security, faster handshakes, and improved performance compared to previous versions. With increasing cyber threats, enabling TLS 1.3 on web servers like Apache and Nginx is crucial for protecting sensitive data during transmission between servers and clients. TLS 1.3 provides several advantages including reduced latency, stronger encryption algorithms, and elimination of vulnerable legacy features. This article will guide you through the process of enabling TLS 1.3 on both Apache and Nginx web servers. Prerequisites Before enabling TLS 1.3, ensure that both your web ...
Read MoreHow to Enable USB in VirtualBox?
VirtualBox is a powerful cross-platform virtualization software that allows users to run multiple operating systems on a single machine. By default, VirtualBox does not enable USB support for security reasons, but this feature can be easily enabled to allow guest operating systems to access USB devices connected to the host computer. Enabling USB support in VirtualBox enhances your virtualization experience by allowing interaction with USB devices such as storage drives, printers, or scanners from within the guest OS. This functionality is essential for development, testing, and everyday use scenarios where USB device access is required. Prerequisites Before ...
Read MoreHow to Enable WordPress Debugging Mode to Fix Errors?
WordPress Debugging Mode is a built-in feature that helps website administrators and developers identify and troubleshoot errors by displaying detailed error messages. When enabled, it reveals PHP errors, warnings, and notices that are normally hidden, making it easier to diagnose issues like plugin conflicts, theme problems, or coding errors. Understanding WordPress Errors WordPress errors can disrupt your website's functionality and negatively impact user experience. Understanding common error types helps in effective troubleshooting. Common WordPress Errors The most frequent errors include the White Screen of Death (WSOD), where a blank screen appears instead of content, and Database ...
Read MoreHow to Enable/Disable UFW Firewall on Ubuntu 18.04 & 20.04?
UFW (Uncomplicated Firewall) is Ubuntu's built-in firewall tool designed to simplify network security management. It provides an easy-to-use interface for configuring iptables rules, helping protect your Ubuntu 18.04 or 20.04 system from unauthorized access and potential attacks. UFW follows a default-deny policy for incoming connections while allowing outgoing traffic, making it an essential security component for both servers and desktop systems. Why Enable/Disable UFW Firewall? Enabling UFW is crucial for system security as it creates a barrier against malicious traffic. You need to enable specific ports when running services like web servers (ports 80/443 for HTTP/HTTPS) or ...
Read MoreHow to Encrypt Drives Using LUKS in Fedora Linux?
Linux Unified Key Setup (LUKS) is a disk encryption specification that provides an easy-to-use interface for encrypting hard drives. It is a widely used encryption standard in the Linux community, ensuring data stored on your hard drive remains safe from unauthorized access in the event of theft or loss. When you encrypt a drive with LUKS, all your files, documents, and media become unreadable without the correct password. Without this password key, it's virtually impossible to access the contents of an encrypted drive. Considering the amount of sensitive information we store on our computers — tax records, personal finance ...
Read MoreHow to Encrypt Full Disk While Installing Ubuntu 22.04?
Data security has become a critical concern in today's digital world where personal and professional information is stored on computers. Full disk encryption protects your data by encrypting the entire hard drive, making it unreadable without the correct passphrase even if someone gains physical access to your device. Ubuntu 22.04 provides built-in full disk encryption using LUKS (Linux Unified Key Setup) with AES-256 encryption. This feature encrypts all data including the operating system, applications, user files, and temporary files, ensuring comprehensive protection. Prerequisites Before starting the installation process, ensure you have − A bootable USB ...
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