
Harry Hill
Content Writer (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.

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 […]

Grep Command in Linux: Search Specified Strings in Text Files
Developers are usually attracted to the Linux operating system because they can achieve their goals in an easier way and perform their tasks efficiently by familiarizing themselves with Linux commands. Linux offers a variety of helpful commands so that users can have the best performance in managing their projects; the world of Linux is not […]

Change DNS Server Settings in Linux
Domain name server (DNS) translates the internet address to the numeric machine address. A DNS server converts each domain name you enter into your browser into an IP address. The website you want to visit can then be found and connected to using that address by your browser. Since your internet speed is affected by […]

4 Commands to Clear Terminal Screen in Linux
Has it ever happened to you that you get so engrossed in working with your Linux terminal environment that you are suddenly shocked to encounter a busy screen full of various commands and get confused by viewing the crowded terminal environment?

Kill Process in Linux Using kill Command
Kill process in Linux using kill command involves identifying the process ID (PID) and sending termination signals like SIGTERM or SIGKILL. This method safely or forcefully stops unresponsive or resource-heavy processes to maintain system stability. 🤖AI Overview: The kill command in Linux enables users to terminate processes by sending signals such as SIGTERM or SIGKILL. […]

Install & Use wget Command in Linux
Wget is a free network downloader used to download files from the server. As a non-interactive downloader, it works in the background even when the user is not logged on without impediment to the ongoing process. To learn Everything about Wget Command in Linux, stay with us till the end and review some practical examples […]

How to Use APT Package Manager in Ubuntu
As a free and open-source Linux distribution based on Debian, Ubuntu comes with a comprehensive package management system. To install, upgrade, configure, and remove software, management tools are required to manage the packages. The Advanced Packaging Tool (APT) is one of them. In this article, you will learn How to Use APT Package Manager in […]

ls Command in Linux to List File & Directory
ls Command is a simple command used to display a list of files and sub-directories in Linux. Whether you are a Linux system administrator or a regular user, the ls command is one of the first ones you will use to see the content of a directory and the files in it.

How to Use Port Knocking in Linux to Secure SSH Server
Knock-Knock! Do you need to protect your Linux system from automated port scanners to secure the SSH server? Join us with this guide to learn How to Use Port Knocking in Linux to Secure SSH Server. By creating a connection attempt on a set of predetermined closed ports, port knocking is a technique used in […]

How to Use Time Command in Linux
As a Linux administrator or a normal user, you will find learning Linux commands useful to move on and do the tasks correctly. One of the most efficient commands of Linux is the Time command which shows ”real time”, ”user time”, and ”sys time” information. In this article, you will learn How to Use Time […]

Use Linux File Command to Determine File Type
Managing data and files is one of the tasks of Linux system administrators for their better performance in the direction of their goals. Managing data and files in Linux systems is not as simple as you think. Linux includes various standard files such as Symbolic link, Regular, Directory, Block special, FIFO special, and Character special, […]

How to Use Nmap Command in Linux to Scan Open Ports
Nmap stands for Network Mapper. It is an open-source command line tool in Linux used for network exploration and security auditing. As a system administrator, you can use Nmap to scan networks and monitor host and service uptime. In this article, you will learn How to Use Nmap Command in Linux to Scan Open Ports. […]