How to Resize Images While Maintaining Aspect Ratio in Python: A Comprehensive Guide
Learn how to resize images while maintaining the aspect ratio in Python using libraries like Pillow and OpenCV. Follow our step-by-step guide with code examples, best practices, and troubleshooting tips. Table of Contents Introduction Resizing images while maintaining their aspect ratio is a crucial task in many applications, from web development to machine learning. Whether you’re […]
Configuring Timezone in Zabbix for Accurate Monitoring
Learn how to configure the timezone in Zabbix for accurate monitoring and reporting. Follow our step-by-step guide to set the system timezone, update PHP settings, and synchronize with NTP. Ensure proper timestamps in your Zabbix server and frontend. Table of Contents Introduction Zabbix, a powerful open-source monitoring solution, relies on accurate time synchronization for proper […]
Understanding SELinux Contexts on RHEL 9 | CentOS 9 for Security
Learn how to manage SELinux contexts on RHEL 9 and CentOS 9 for improved security. This guide covers SELinux contexts, CLI commands, troubleshooting, and best practices. Table of Contents Introduction Security-Enhanced Linux (SELinux) is a crucial security mechanism in Red Hat Enterprise Linux (RHEL) 9 and CentOS 9. It enforces mandatory access control (MAC) policies, preventing unauthorized access […]
How to Combine Multiple PDFs into One Using Python: A Step-by-Step Guide
Learn how to combine multiple PDFs into one using Python. This comprehensive guide covers step-by-step instructions, CLI examples, and troubleshooting tips for merging PDFs with Python’s PyPDF2 library. Table of Contents Introduction In the digital world, managing files efficiently is key to improving productivity and organizing your data. One common task that many users face […]
Essential Chrony Commands Every System Administrator Should Know
Chrony commands for systems administrators offers insight into essential commands every sysadmin should know. This comprehensive guide covers configuration, synchronization, troubleshooting, and advanced Chrony usage for accurate system time management. Table of Contents Introduction Chrony is an NTP client and server software designed for keeping accurate time on Linux-based systems. It is especially suited for systems […]
Key Differences between NTP and Chrony
Learn the key differences between NTP and Chrony, two popular time synchronization protocols. Discover which one suits your needs based on accuracy, efficiency, and security. Table of Contents Introduction In the world of networking, accurate time synchronization is crucial for everything from logging events and tracking data packets to maintaining the proper functioning of distributed […]
How to Resolve SSH Weak Key Exchange Algorithms on RHEL 9 or CentOS 9
Learn how to resolve weak key exchange algorithms in SSH on RHEL 9 and CentOS 9. This step-by-step guide provides troubleshooting tips, solutions, and CLI examples to help secure your SSH connections. Table of Contents Introduction SSH (Secure Shell) is a critical protocol for securely managing servers, especially on Linux-based distributions like RHEL 9 and CentOS 9. […]
How to Maintain a Security Warning Banner in Zabbix with Ansible
Learn how to use Ansible to automate the maintenance of a security warning banner in Zabbix. Step-by-step instructions, CLI examples, and best practices for ensuring security compliance across your infrastructure. Table of Contents Introduction In today’s world, maintaining robust security is paramount. For organizations using Zabbix, an open-source monitoring software, ensuring that a security warning banner […]
Install Portainer CE for Managing Docker on CentOS 9
Learn how to install and configure Portainer CE on CentOS 9 for efficient Docker management. Follow our step-by-step guide with CLI examples to get started today. Table of Contents Introduction Managing Docker containers efficiently can be challenging without a graphical interface. Portainer Community Edition (CE) simplifies this task by providing a user-friendly web interface for […]
Setting Up Local DNS Server on CentOS 9 with BIND
Learn how to set up a local DNS server on CentOS 9 using BIND, with detailed instructions, CLI examples, and best practices for managing DNS zones and records. Table of Contents Introduction In today’s world of networked systems, DNS (Domain Name System) is one of the most critical components. It helps resolve human-readable domain names […]