Guide to Devops technologies

What is Virtualization what are the products are available in market to achieve this(Typically server, application and Desktop Virtualizations) Ø   Virtualization provide a layer of abstraction between computer hardware systems and the software running on them. It allows multiple operating system instances to run concurrently on a single computer. Ø   virtualization system sits  between the guest and the hardware, it can control the guests’ use of CPU, memory, and storage, even allowing a guest OS to migrate from one machine to another. It means of separating hardware from a single operating system. Each “guest” OS is managed by a Virtual Machine Monitor (VMM), also known as a hypervisor . Hypervisor virtualization is where the true power in virtualization comes from. There is two types of hypervisors Ø   Type 1 Hypervisor(native,  bare metal )   à   These are installed on the bare metal of the server. It means directly on the physical  hardware e.g .

There are many commands to check information about the hardware of your Linux system like CPU or memory etc. The list includes lscpu, dmidecode, lspci etc. 1).lscpu It gives info about CPU and processing units as below. 2).lspci: The lspci command lists out all the pci buses and details about the devices connected to them. The vga adapter, graphics card, network adapter, usb ports, sata  controllers , etc all fall under this category. you can also specific devices you want as below... [root@www ~]# lspci -v | grep -i ide 00:07.1 IDE interface: Intel Corporation 82371AB/EB/MB PIIX4 IDE (rev 01) (prog-if 8a [Master SecP PriP]) [root@www ~]# lspci -v | grep -i USB 02:00.0 USB controller: VMware USB1.1 UHCI Controller (prog-if 00 [UHCI]) 02:03.0 USB controller: VMware USB2 EHCI Controller (prog-if 20 [EHCI])         Subsystem: VMware USB2 EHCI Controller [root@www ~]# lspci -v | grep -i vga 00:0f.0 VGA compatible controller: VMware SVGA II Adapter (prog-if 00