Harry Hill

Content Writer ( 119 Articles )

I’m Harry, the CTO of OperaVPS and a Senior Linux System Administrator with a strong background in systems engineering, DevOps, and cloud infrastructure. Since 2020, I’ve been sharing advanced insights on topics like virtualization technologies, Linux performance tuning, and secure server deployment. My focus is on delivering in-depth content for developers and professionals who want scalable, reliable, and efficient solutions.

Curl command in Linux

Master the Curl Command in Linux with 15 Examples

The curl command in Linux is a tool for transferring data using various protocols. It allows users to download, upload, and manage files efficiently through simple command-line instructions. 🤖AI Overview: The curl command in Linux is used for transferring data across a network using various protocols such as HTTP and FTP. It enables users to […]

Steps to Install Nagios on CentOS Rocky Linux AlmaLinux

Install Nagios Core and Plugins on Linux: The Definitive Guide

As a CTO and Senior Linux System Administrator, I understand how vital a robust, scalable monitoring solution is for modern infrastructure. Nagios, ranked among the Top 10 Network Monitoring tools in 2023, delivers advanced visibility through its flexible plugin ecosystem. This guide offers a clear, best-practice approach to installing and configuring Nagios on CentOS, Rocky […]

Why Quality Of The RDP Connection Is Low

Why Quality Of The RDP Connection Is Low?

Today, RDP usage has increased a lot, and some of us use it for several hours a day, so if the quality of the RDP connection is low, we will not enjoy using it, and sometimes we may not be able to use it totally. And if we use a tool repeatedly, the quality of […]

Setting Up Remmina for RDP Access on Linux

Setting Up Remmina for RDP Access on Linux

Remmina is a free, open-source software for connecting to a remote server (Remote Desktop). You can use this software to connect to Windows VPS via Ubuntu Linux operating system. This software is a replacement for the remote desktop connection of Windows systems and supports various protocols. RDP, which stands for Remote Desktop Protocol, is a […]

Install Linux Bash In Windows

Install Linux Bash In Windows

After releasing the creator update in Windows, Microsoft added a feature that allows users to install Linux Bash in Windows 10. After installing the Linux Bash or Linux terminal in Windows, Windows users will be able to execute Linux commands and use them in Windows.

Complete Guide to Install rsync Command in Ubuntu, Debian, CentOS, Fedora

Install rsync Command in Ubuntu, Debian, CentOS, Fedora

The rsync command, short for Remote Sync, is one of the most widely used Linux commands that is used to copy and synchronize files and directories remotely as well as locally in Linux systems. The versatile rsync command provides the possibility of transferring and synchronizing data between the local machine and the remote host or […]

How to Enable WiFi in Kali Linux

How to Enable WiFi in Kali Linux

There are two ways to enable WiFi in Kali Linux. You can either use the Graphical User Interface (GUI) or use the terminal on Kali to enable WiFi.. Enabling WiFi in Kali is easier if you go with the GUI solution. You can enable WiFi in famous Linux GUI like KDE, GNOME, and Xfce. And […]

Dangerous & Destructive Linux Commands

16 Dangerous & Destructive Linux Commands You Should Avoid

Linux is an open-source and advanced operating system, that’s why it is very popular among users and developers. The Linux terminal provides features that users are deprived of using such features the graphical user interface. The ability to use the valuable features of the terminal and apply the changes you need by the command line […]

How to Install bpftool Command in Linux

How to Install bpftool Command in Linux

The bpftool command is an essential tool for managing and inspecting eBPF programs and maps on Linux. Install bpftool command in Linux is essential for users to perform advanced kernel-level diagnostics, and provide valuable insights into system performance and network tracing. To Install bpftool Command in Linux: Ubuntu and Debian-based distros: sudo apt install bpftool […]

fix sudo command not found error in linux

2 Methods to Fix sudo: command not found Error in Linux

sudo command not found error means sudo package is not installed or PATH variable does not include sudo’s directory. To fix this bash error, you can install sudo in linux using apt install sudo command (apt package manager for Debian-based distributions).

How to Check CPU Architecture Command Linux

How to Check CPU Architecture Command Linux?

Knowing how to check CPU architecture command Linux is key to software compatibility, performance, and future upgrades. Quickly identifying 32-bit (i686) or 64-bit (x86_64) support helps you choose the right software and stay aligned with modern standards. Discover the top Linux commands to check CPU architecture, summarized in the comparison table below for quick reference. […]

Quick Solutions for Systemctl Command Not Found on Ubuntu

systemctl command not found

The “systemctl command not found” error occurs when Ubuntu can’t recognize or locate the systemctl command, essential for managing services and processes in Linux systems using systemd. This can hinder system administration and troubleshooting tasks. Common Causes of systemctl Command Not Found Ubuntu: Your system may not use systemd (common in older or minimal Ubuntu […]

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