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Linux Deployment and Functional Specialization

The GNU/Linux is a UNIX-like operating system used on a wide range of devices from supercomputers, IBM mainframe, servers, desktop workstations, tablet PCs to smartphones. The Linux kernel is available under an open source license. Functional specialization has occurred with Linux: base operating system platform for database, web servers, middleware, backoffice operations, internetworking with Microsoft domain models, integration with IBM mainframe systems, and mobile computing.

Google Android - Linux-variant operating system
Centos Linux Fedora Red Hat
Google / Alphabet Centos Linux Fedora Linux - Red Hat Corporation
Red Hat Linux-variant operating system
SUSE Linux-variant operating system Ubuntu Linux-variant operating system
Red Hat Linux Attachmate / Micro Focus Cannonical Ltd.

The increase in the deployment and use of the Linux operating system is driven by information technology demographics: data center scalability, distributed processing, mobile devices, cloud computing, Big Data, and open source projects. Open source and commercial subscriptions of Linux-variant operating systems provide cost control and flexibility in long term planning.

The RPM: Red Hat Package Manager was developed for its own software packages. All dependencies must be installed for it to work correctly. RPM is unable to automatically perform this task; it only can check whether all the required packages are in place prior to package installation. Over time other independent RPM-based distributions were written to use it.

Yellowdog Updater Modified: YUM is an interactive front-end tool for getting, installing, deleting, querying, and managing Red Hat Enterprise Linux RPM software packages and third-party repositories. It is used in Red Hat Enterprise Linux versions 5 and later. The YUM is capable of tracking the dependencies of a package required for standard and selective installation. Packages that can not be found on the system are searched for in the available system repositories. In addition to dependency analysis and obsolete processing based on repository metadata, YUM can perform installation of new packages, removal of old packages, and queries on the installed or available packages within other commands and services. Both RPM and YUM use command-line parameters. There are graphical user interfaces that can be used on top of either YUM or RPM. Ubuntu is based on the Debian Linux distribution and runs on many platforms; it can not use RPM. Additional more recent graphical interface development is happening with PackageKit and the gnome-packagekit application.

A hypervisor is a program which allows multiple operating systems to share a single hardware host. It creates virtual machine environments and coordinates calls for processor, memory, hard disk, network, and other resources through the host operating system. The KVM: Kernel-based Virtual Machine is the virtualization layer. The Linux kernel acts as a Type 2 Hypervisor, streamlining management and improving performance in virtualized environments. Xen is an alternative open source hypervisor with the Linux kernel for the hypervisor control interface.

Public cloud services are being developed built using Linux in conjunction with other open source software software. The use of Linux with mainframe systems and IBM Power provides an additional virtualized deployment platform. IFL: Integrated Facility for Linux is a processor dedicated to Linux workloads on IBM Z hardware systems. It is supported by the Linux operating system for IBM Z mainframe hardware, IBM z/VM with IBM Wave for z/VM, KVM, and container technologies. The IBM z14 offers processing capacity with up to 170 user-configurable IFLs on one server, up to 30 IFLs are possible on the z14 Model ZR1. IFLs allow for a high virtual Linux server density resulting in reduced expenses in the areas of processing, software licensing, energy, and floor space.

SYS-ED evaluates, analyzes, and teaches the leading Linux distributions.

The SYS-ED training service has been expanded to provide courseware and documentation services for Linux-variant operating systems.