Jeff Wilson 
We all know that CentOS comes with root access disabled for the outside world by default. This means that you can not directly log in as a root user via SSH, but you can still go ahead and utilize root privileges by using the ‘sudo’ command instead.
However, sometimes it is more convenient to log in directly as the root user. That’s why in this article, we will talk about how to enable, disable and secure the SSH login to your server when attempting to log in as root.
Mastodon is an open-source free social network based on open web protocol. It used Ruby on Rails for the back-end and React.js and Redux for the front-end. In this tutorial, we will show you how to install Mastodon on a CentOS 7 server.
We will show you how to install PHP 7.2 on CentOS 7 as an operating system. PHP is a server-side scripting language commonly used for Web development, but it is also used as a general-purpose programming language. PHP powers WordPress, the most popular content management system used for blogging and building websites as well as may other e-commerce websites, customer relationship management software, enterprise resource planning software and much more. Installing PHP 7.2 on CentOS 7 is a pretty easy task and it should be completed in less than 10 minutes.
If you’ve managed a Linux server for any length of time, you’re familiar with the problem of log files. They can sometimes be difficult enough to even find in the first place, and then you’re sometimes confronted with a file that’s hundreds of MB in size (or even GB). Searching through it is a pain, and they can eventually even start eating up your storage space.
WildFly is a state-of-the-art Java web application server designed around speed and being lightweight. Formerly known as JBoss, WildFly is open-source and aims to provide the fastest Java runtime environment possible. With features such as subsystem blocks made to be easily added and removed, centralized configurations between environments, support for the latest Java enterprise standards, and much more, WildFly is an excellent choice for an application server.
Anyone who’s administered a Linux server for a certain amount of time is familiar with the “grep” command. With Linux’s philosophy of “Everything is a file”, grep becomes crucial to traversing log files, configuration files, checking for certain errors in output files, and getting the number of matches. In this tutorial, I’ll show you a few advanced uses of grep that can still be pretty useful. These are not hard to find in the man pages, but they’re just an extension of grep’s default functionality.
Nextcloud is a self-hosted file sharing application that allows you to store your data, such as files, contacts, images, calendars, news and more. Using Nextcloud to store your documents can remove your need for using third-party hosting software like Dropbox, Google Drive, iCloud. In this article, we will install Nextcloud 14 on Debian 9, with Apache web server, MariaDB and PHP 7.0.
