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Open Source Articles
Page 18 of 123
How to Change Nginx Port in Linux?
Nginx is a popular open-source web server known for its speed, reliability, and scalability. The default port for Nginx is 80, which handles standard HTTP traffic. While this port works well in most cases, changing it can enhance security by making your server less predictable to potential attackers who commonly target well-known ports. Checking Current Nginx Configuration Before changing the Nginx port, it is important to verify that your current configuration is correct and identify where the port settings are located. Step-by-Step Configuration Check Follow these steps to check your current Nginx configuration − ...
Read MoreHow to Change or Reset Administrator Password on Windows Server?
In today's world, security is one of the top priorities for any organization. The consequences of a security breach can be catastrophic, leading to loss of critical data, financial losses, and reputational damage. One way to ensure that your Windows Server environment stays secure is by maintaining strong passwords for your administrator accounts. As the administrator account has elevated privileges and access to sensitive data and systems in the network, it's crucial to secure it with a strong password that can't be easily guessed or cracked by attackers. A weak password is akin to leaving the front door open ...
Read MoreHow to Change or Set Hostname on CentOS 8/RHEL 8?
In computer networking, a hostname is a human-readable label used to identify devices connected to a network. Instead of remembering complex IP addresses, hostnames provide an intuitive way to access and communicate with network devices, making network administration and resource sharing much more manageable. Hostnames are essential for network communication because devices use them to identify themselves during communication. This simplifies network operations and makes it easier for users to connect to services and resources across the network. Checking the Current Hostname Before modifying the hostname, you should first check the current configuration. On CentOS 8/RHEL 8, ...
Read MoreHow to Change Port for Jenkins?
Jenkins is an open-source automation server that helps developers build, test, and deploy their software. When installed, Jenkins uses port 8080 by default to listen for HTTP requests. However, this port may conflict with other applications or not meet your environment's security requirements, making it necessary to change the port number. Understanding Ports in Jenkins A port is a virtual communication endpoint that allows applications to exchange data over a network. Ports are numbered from 0 to 65535, with specific numbers reserved for particular services (e.g., port 80 for HTTP, port 443 for HTTPS). Common Jenkins Ports ...
Read MoreHow to Change Runlevels (targets) in SystemD?
SystemD is a system and service manager for Linux operating systems that manages the boot process, system services, and provides a centralized way to manage processes. One of its key features is the use of targets (the modern equivalent of runlevels) to define different system states and control which services run during startup and operation. Understanding how to change targets is essential for Linux administrators as it allows precise control over system behavior, resource usage, and available services based on specific operational requirements. Understanding SystemD Targets SystemD replaces traditional Unix runlevels with targets, which are more flexible ...
Read MoreHow To Change Speed & Duplex of Ethernet Card in Linux with Ethtool Command?
Ethernet cards, also known as network interface cards (NICs), are hardware components that allow computers to connect to networks. These cards enable data transmission between devices by converting digital signals from a computer into electrical signals that can be sent over the network's physical medium, such as copper wires or fiber-optic cables. Ethernet cards are essential for accessing the internet, file sharing and printing in a local network. Understanding Ethtool Command Ethtool is a Linux command-line utility that allows users to query and change various network interface card (NIC) settings. It provides detailed information about the NICs installed ...
Read MoreHow to Change SSH Port in Linux?
Secure Shell (SSH) is a network protocol that provides encrypted communication over an insecure network. By default, SSH listens on port 22, which is well-known and frequently targeted by attackers. Changing the SSH port to a non-standard number adds an extra layer of security through security through obscurity. Checking Current SSH Port Before changing the SSH port, verify which port your SSH service is currently using. Use the following command to check the current configuration: sshd -T | grep port This command will display output similar to: port 22 addressfamily any listenaddress ...
Read MoreHow to Check and Install Updates On CentOS and RHEL?
Keeping your system up to date is essential for maintaining the security, stability, and performance of your CentOS or RHEL server. Cybercriminals constantly look for vulnerabilities in operating systems and software, making regular updates crucial to prevent data breaches and security exploits. Software updates also include bug fixes and enhancements that improve functionality and compatibility. This guide covers how to check for and install updates on CentOS and RHEL using both Yum Package Manager (legacy) and DNF Package Manager (modern). You'll also learn how to set up automatic updates to streamline maintenance. Checking for Updates Before installing ...
Read MoreHow To Check If File or Directory Exists in Bash?
In Bash scripting, checking file or directory existence is a fundamental task for system administrators and developers. Bash provides several built-in commands and operators to test whether files and directories exist before performing operations on them, helping prevent errors and ensuring script reliability. Using the Test Command The test command is a built-in Bash utility that evaluates conditions and returns an exit status of 0 (true) or 1 (false). It offers various options for checking file and directory existence. Basic Test Options Option Description Usage -e Checks if file ...
Read MoreHow to Check Integrity of File and Directory Using AIDE in Linux?
AIDE (Advanced Intrusion Detection Environment) is a file and directory integrity checker for Linux systems. It creates a database snapshot of your system's files and directories, then uses this baseline to detect unauthorized changes, tampering, or corruption. AIDE monitors file attributes including permissions, ownership, size, timestamps, and cryptographic checksums. File integrity checking is crucial for system security, data protection, and compliance requirements. When files are modified without authorization, it can indicate security breaches, malware infections, or system corruption that requires immediate attention. Installing AIDE on Linux System Requirements Before installing AIDE, ensure your system meets these ...
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