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Overview Linux Server

Overview Linux Server. RHEL vs Fedora Virtual Box vs Vmware. Background Red Hat. Who created the Red Hat? Marc Ewing creates his own distribution(1994). Background Red Hat.. cont. 2. Why the name “ RedHat ”? From the article:

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Overview Linux Server

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  1. Overview Linux Server RHEL vs Fedora Virtual Box vsVmware

  2. Background Red Hat • Who created the Red Hat? Marc Ewing creates his own distribution(1994)

  3. Background Red Hat..cont 2. Why the name “RedHat”? From the article: • In an interview with Red Hat Magazine, co-founder Bob Young said that the red hat has long been a symbol of freedom, with revolutionaries in both America and France donning red caps during their uprisings. • "There is a tradition in western history of red being the symbol of liberation and challenge of authority," he says in the taped interview. • As for the name Red Hat specifically, fellow co-founder Marc Ewing also had an affinity for red hats and wore his grandfather's red lacrosse hat during his time at Carnegie Mellon.

  4. Background Red Hat..cont • Milestones: • Partnership with IBM • Used in all enterprise level, known as the best in its kind • Revenue : $ 652.6 million • RedHatEnterprise Linux contains more than 1200 components. • These are the work of over 5 years of develop-ment. • Wide range of functionalities are covered.

  5. Enterprise Linux or Fedora? Product or project: choose for yourself • Several years ago, there was only one Red Hat Linux's growing and gaining acceptance. Linux is concentrated into the enterprise computing. Then Red Hat Linux product could no longer be all things to all users. That is why in 2002, Red Hat created the Red Hat Enterprise Linux. Stable, supported, certified - Red Hat Enterprise Linux has become a standard Linux. • The Fedora Project was introduced in late 2003. Built for and with the help of the open source community, the Fedora Project is for developers and high-tech fanatics using Linux in non-critical computing environments.

  6. Which Linux is right for you? See for yourself. See details: http://www.redhat.com/software/rhelorfedora

  7. Features • Some features such as: • Virtualization • Kernal & Performance • Packaging • Security • Networking RedHat |

  8. What is Virtual Machine • A virtual machine (VM) is a software implementation of a computing environment in which an operating system (OS) or program can be installed and run. • The virtual machine typically emulates a physical computing environment, but requests for CPU, memory, hard disk, network and other hardware resources are managed by a virtualization layer which translates these requests to the underlying physical hardware. • VMs are created within a virtualization layer, such as a hypervisor or a virtualization platform that runs on top of a client or server operating system. This operating system is known as the host OS. The virtualization layer can be used to create many individual, isolated VM environments.

  9. Why is virtualization useful? • Running multiple operating systems simultaneously. • Easier software installations. • Testing and disaster recovery • Infrastructure consolidation.

  10. Based on several scenarios using Virtual Box: Running multiple operating systems simultaneously. • VirtualBox allows you to run more than one operating system at a time. This way, you can run software written for one operating system on another (for example, Windows software on Linux or a Mac) without having to reboot to use it. Since you can configure what kinds of "virtual" hardware should be presented to each such operating system, you can install an old operating system such as DOS or OS/2 even if your real computer's hardware is no longer supported by that operating system.

  11. Based on several scenarios using Virtual Box (cont): Easier software installations. • Software vendors can use virtual machines to ship entire software configurations. For example, installing a complete mail server solution on a real machine can be a boring task. With VirtualBox, such a complex setup (then often called an "appliance") can be packed into a virtual machine. Installing and running a mail server becomes as easy as importing such an appliance into VirtualBox.

  12. Based on several scenarios using Virtual Box (cont): Testing and disaster recovery. • Once installed, a virtual machine and its virtual hard disks can be considered a "container" that can be arbitrarily frozen, woken up, copied, backed up, and transported between hosts. • On top of that, with the use of another VirtualBox feature called "snapshots", one can save a particular state of a virtual machine and revert back to that state, if necessary. This way, one can freely experiment with a computing environment. If something goes wrong (e.g. after installing misbehaving software or infecting the guest with a virus), one can easily switch back to a previous snapshot and avoid the need of frequent backups and restores. • Any number of snapshots can be created, allowing you to travel back and forward in virtual machine time. You can delete snapshots while a VM is running to reclaim disk space.

  13. Based on several scenarios using Virtual Box(cont): Infrastructure consolidation/association • Virtualization can significantly reduce hardware and electricity costs. Most of the time, computers today only use a fraction of their potential power and run with low average system loads. A lot of hardware resources as well as electricity is thereby wasted. So, instead of running many such physical computers that are only partially used, one can pack many virtual machines onto a few powerful hosts and balance the loads between them.

  14. Virtual Box vs VMware Source: http://www.sysprobs.com/virtualbox-316-vmware-player-3-desktop-virtualization-software

  15. Features Virtualization • Comes in all server products. • Supports virtualized guest operating systems. • Virt-Manager. (In windows VMWare can be used) RedHat |

  16. Features Kernal & Performance • RedHat is based on linuxkernal 2.6.18 • Support for multi core processors. RedHat |

  17. Features Kernal & Performance • Symmetric multi-processing support. • Network accelerator technology. RedHat |

  18. Features Packaging • Server: • RedHat Enterprise Linux Advance platform • RedHat Enterprise Linux (stand alone) • Desktops: • RedHat Enterprise Linux Desktop (RedHat Desktop) • RedHat Enterprise Linux Desktop with workstation. RedHat |

  19. Features Security • Multi-Level Security and targeted policies for all services. • Integrated directory and security capabilities. • Internet security enhancements and improved performance. • Real time monitoring and auditing. RedHat |

  20. Features Network • Latest ip v6 is supported. • File printing. • Active Directory intergration (both windows and unix) RedHat |

  21. Features Desktop RedHat |

  22. Features Desktop • Desktop enhancements include configuration tools, applications, and laptop support. • Foundational Stateless Linux features (X Window). • Integrated Multimedia support. • Enhanced graphics using fading and transparency etc. RedHat |

  23. Version • First version was considered as codename “ZOOT”. • RHEL 2.1 AS “Pensacola” • RHEL 2.1 AS “Panama” • RHEL 3 was codenamed as “Taroon” • RHEL 4 was “Nahtan” • And currently RHEL 5 is codename “Tikanga” Although these were the codenames lots of version of red hat was produced as stable and beta versions. RedHat |

  24. Conclusion • RedHatlinux is flexible operating system. • It can be customized to enterprise needs. • Incredibly amazing GUI. • Uses enhanced security, networking and Kernal performance. • Cost effective. • Can be implemented easily. RedHat |

  25. Forget about the blues, go with the red RedHat |

  26. FINISH LECTURE CLASS NEXT WEEK…COMEBACK TO REVISION CLASS

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