Single User Mode (sometimes known as Maintenance Mode) is a mode in Unix-like operating systems boots into a single user (superuser) where only few services are started at system boot just to provide basic functionality. This mode used mainly for maintenance of multi-user environments and perform certain critical tasks. Some tasks may require exclusive access to shared resources.
PostgreSQL, also known as Postgres, is a free and open-source relational database management system (RDBMS) emphasizing extensibility and technical standards compliance. It is designed to handle a range of workloads, from single machines to data warehouses or Web services with many concurrent users.
Hosting your website on a web hosting service running cPanel is fun. But how if you need more resource like running cron or mail server? Rent a dedicated server or co-location seems to be the answer some years ago. Now, as the virtualization technology getting more advanced, we could pay about the price of a nice meal to get a VPS.
Android is a mobile operating system developed by Google. It is based on a modified version of the Linux kernel and other open source software, and is designed primarily for touchscreen mobile devices such as smartphones and tablets. In addition, Google has developed Android TV for televisions, Android Auto for cars, and Wear OS for wrist watches, each with a specialized user interface. Variants of Android are also used on game consoles, digital cameras, PCs and other electronics.
Oracle VM VirtualBox (formerly Sun VirtualBox, Sun xVM VirtualBox and Innotek VirtualBox) is a free and open-source hosted hypervisor for x86 virtualization, developed by Oracle Corporation. Created by Innotek GmbH, it was acquired by Sun Microsystems in 2008, which was, in turn, acquired by Oracle in 2010.