In this article, we will see 100 PromQL(Prometheus Query Language) MCQs for Interviews and Exams. Prometheus Query Language, commonly known as PromQL, is a powerful and flexible query language specifically designed for the Prometheus monitoring system. Prometheus is an open-source system monitoring and alerting toolkit, widely used for its robust metrics collection, querying capabilities, and ... Read more
Proxies serve as intermediaries between users and the internet, masking their real IP addresses. This capability is particularly useful in circumventing geo-restrictions and access limitations on various online platforms. This article delves into three specific uses of proxies as great examples to showcase the power of proxies: Ticketmaster, Rank Tracking, and YouTube proxies, explaining how ... Read more
![How to use preg_match in PHP [Explained with examples] 2](https://www.cyberithub.com/wp-content/uploads/2023/11/preg_match.jpg)
In this article, we will see how to use preg_match in PHP. preg_match provides a powerful, efficient, and flexible way to perform pattern matching, data validation, and string manipulation, which are common requirements in web development and data processing tasks. Regular expressions, when used with preg_match, are incredibly powerful for validating formats. Common use cases ... Read more
In this article, we will see how to install veracrypt on Ubuntu 22.04. If you are looking for a disk encryption software that can work on all famous platforms such as Windows, Linux and MacOS then there is no better utility than VeraCrypt software. It is a free and open source application that can be ... Read more
In this article, we will see how to install veracrypt on Ubuntu 20.04. VeraCrypt is a free and open source disk encryption software for Windows, Linux and MacOS. It is not just another disk encryption software but is a lot more efficient and better than its peers with tons of built-in features. One of the ... Read more
In this article, we will see how to install Gdebi on Ubuntu 22.04. Many times you might have observed that when you try to install any debian(.deb) packages on your Ubuntu/Debian based systems through dpkg utility, it fails with dpkg: dependency problems error. It is simply because dpkg utility itself cannot handle the dependencies. You ... Read more
In this article, we will see how to solve add-apt-repository: command not found error. add-apt-repository is a free and open source utility to add PPA repository on Ubuntu/Debian based systems. Sometimes it is possible that when you try to add a PPA repo to download and install a package from it, you might end up ... Read more
In this article, we will see 20 dig command examples in Linux. dig, also known as domain internet groper is a free and open source tool for querying the domain name system(DNS). It is very commonly used for performing DNS lookups to retrieve various DNS records such as A (address), MX (mail exchange), NS (name ... Read more
In this article, we will see how to install whois utility on Ubuntu 20.04 based systems. If you are looking for the registration details of the domain, including the owner's name (or organization's name), contact information, registration and expiration dates, and more then there is no better tool than whois utility. All of need to ... Read more
In this article, we will see 13 Linux commands/shell scripts to check if you are connected to internet. Many times when you are unsure about the availability of internet connection in your linux system, you might want to run a quick test to check and confirm. You can do this by using few tools and ... Read more