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Articles by Satish Kumar
Page 2 of 94
How to Change Hostname on Ubuntu 18.04?
A hostname is the unique identifier of a device in a network, used to identify and connect to other devices. It is a label given to a computer that enables unique identification when connected to the internet or any network. By default, Ubuntu assigns a hostname during installation, but you may need to change it to reflect the machine's function or location for easier network identification. Checking Current Hostname Before changing your Ubuntu 18.04 hostname, check the current configuration using the hostnamectl command. Open a terminal and run − hostnamectl This displays system information ...
Read MoreHow to Change Hostname on Ubuntu 20.04?
A hostname is the unique name that identifies a device on a network. It allows other devices to locate and connect to it, making it an essential component of any network setup. Whether you're running a small home network or managing multiple servers in an enterprise environment, understanding how to change the hostname can come in handy. In this article, we'll explore how to change the hostname on Ubuntu 20.04 using both the command line interface (CLI) and Ubuntu's graphical user interface (GUI). Checking Current Hostname Before changing the hostname, you first need to know what the ...
Read MoreHow to Change Jenkins Home Directory?
Jenkins is a popular automation server that helps automate tasks in the software development process. The Jenkins Home Directory, also known as JENKINS_HOME, is the location where all configuration files, plugins, jobs, and other essential files are stored. This directory plays a significant role in maintaining the stability and performance of the Jenkins environment. There may be situations where you need to change the Jenkins Home Directory location, such as moving to a larger disk, relocating to a different server, or organizing your file system better. Preparing to Change Jenkins Home Directory Understanding the Current Jenkins Home ...
Read MoreHow to Change Kernel Runtime Parameters in a Persistent and Non-Persistent Way?
Kernel runtime parameters are settings that control the behavior of the Linux kernel on your system. These parameters can affect a wide range of system functions, such as memory allocation, network performance, and CPU scheduling. Understanding how to change these parameters is crucial for optimizing system performance and troubleshooting issues that may arise. There are two main ways to change kernel runtime parameters: non-persistent changes and persistent changes. Non-persistent changes modify the kernel's behavior temporarily, lasting only until you reboot your system. Persistent changes, on the other hand, modify the kernel's behavior permanently and persist across reboots. ...
Read MoreHow 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 ...
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