Summary of Lecture 1 | Installation of Centos LINUX 7 | Oracle VirtualBox | Hypervisors | Virtual Machines

Summary of Lecture 1: Installation of CentOS Linux 7

In this lecture, the instructor provides a comprehensive guide on installing CentOS Linux 7 using Oracle VirtualBox, discussing key concepts related to hypervisors and the installation process itself.

Main Ideas and Concepts:

• Partitioning Hard Disk:
  • Importance of partitioning during the installation of Linux.
  • Recommended partitions: boot, root, and swap.
• Hypervisors:
  • Definition and classification of hypervisors:
    • Class 1 Hypervisor: Installed directly on hardware (bare metal).
    • Class 2 Hypervisor: Installed on top of an operating system (e.g., VirtualBox).
  • Performance and security differences between Class 1 and Class 2 hypervisors.
• Installation Process:
  • Download and install Oracle VirtualBox from its official site.
  • Create a new virtual machine for CentOS 7 within VirtualBox.
  • Allocate system resources (RAM, CPU, hard disk space) for the virtual machine.
  • Load the CentOS ISO image for installation.
  • Configure network settings and ensure internet connectivity for the virtual machine.
  • Select installation options, including language, time zone, and installation type (minimal vs. server with GUI).
  • Partition the hard disk and configure mount points.
• Post-Installation:
  • Set the root password and create a user account.
  • Understand the importance of the root user and the login process post-installation.
  • Instructions on how to exit the virtual machine and return control to the host operating system.

Detailed Instructions:

• Installing Oracle VirtualBox:
  • Go to the official Oracle VirtualBox website.
  • Download the latest version for your operating system (Windows, Mac, etc.).
• Creating a New Virtual Machine:
  • Open VirtualBox and click on "New".
  • Name the virtual machine (e.g., CentOS 7).
  • Select the type (Linux) and version (Red Hat).
  • Allocate RAM (recommended minimum is 768 MB).
  • Set the hard disk space (default is 20 GB).
  • Choose to create a new virtual hard disk.
• Configuring the Virtual Machine:
  • Go to settings to configure network adapters (select bridge adapter for internet).
  • Load the CentOS ISO image in the storage section.
• Installation Steps:
  • Start the virtual machine and select installation options (verify media, graphical interface).
  • Choose language and time zone settings.
  • Select installation type (Server with GUI recommended).
  • Partition the hard disk:
    • Create a boot partition (200 MB).
    • Create a root partition (15,000 MB).
    • Create a swap partition (remaining space).
  • Start the installation process and set up user accounts.
• Post-Installation:
  • Remove the ISO image from the virtual machine settings.
  • Log in with the root account or the user account created during installation.

Speakers or Sources Featured:

• The instructor (name not specified in the subtitles).

Notable Quotes

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