CentOS Latest Version Download & Installation Guide

Installation Procedure for Latest CentOS

CentOS Linux Distribution is an enterprise level operating system that is developed and maintained at great expense that we can download and deploy without having to pay any money. CentOS is 100% compatible with Red Hat Enterprise Linux. In fact, CentOS is essentially Red Hat Enterprise Linux with the Red Hat branding and logos removed. CentOS is available for free so you get the power and stability of Red Hat Enterprise Linux without having to purchase it

CentOS comes along with Live CD environment but, the LiveCD won't support for permanent CentOS installation. You can only Run the CentOS distribution and its application from the live CD for a instance. This is achieved by using the CentOS Live CD. This is essentially a copy of CentOS that can be run from the DVD/CDROM drive of your system. The Live CD image can be downloaded from the mirror sites listed on the CentOS web site at http://mirror.centos.org/centos/5/isos/

Linux distributions such as Ubuntu or Fedora you may be expecting to be able to perform an installation to disk from the CentOS Live CD. Unfortunately it is not possible to perform CentOS installation from the Live CD

Steps to Follow CentOS Installation
1. For CentOS physical installation you can download the latest entire CentOS version at http://mirror.centos.org/centos/5/isos/ based on your machine type. There are two machine built types available such as 32-bit or 64-bit platform. Select the appropriate CentOS version and burn it as Image CD in a DVD

2. To have a fully functional CentOS environment, make sure that the BIOS is configured to boot from the CDROM/DVD drive before the hard disk and then boot from the CD so that it boots from the CD or DVD drive first

3. Insert the DVD which contains complete CentOS download into the appropriate drive and power on the system. The Community ENTerprise Operating System screen will appear once the system has booted. The installation can be done in either the graphical or text mode installers

4. To install using the graphical installer, simply press the key. To use the text installer type linux text followed by the key
Here we are going to see the CentOS graphical Mode Installation

5. Hit the Enter key for Graphical Mode Installation

6. Navigate through the next few pages to configure your preferred language and keyboard type and press Next

7. Select the Partitioning disc for CentOS from where the drop down menu provides a number of options in terms of how the disk will be used to accommodate the CentOS installation. The options are as follows
Remove all partitions on selected drives and create default layout - Any pre-existing partitions, together with any existing operating systems and associated data files contained therein will be deleted to make room for CentOS
Remove Linux partitions on selected drives and create default layout - this option may be selected to instruct the installer to delete the pre-existing Linux partition and replace it with CentOS, leaving the non-Linux partitions intact
Use free space on selected drives and create default layout - any unallocated space may be assigned to the CentOS installation using this option
Create custom layout - displays the disk partitioning tool allowing each partition on the disk to be manually configured

8. Select the option to encrypt the system upon your requirement. The encryption option is associated with performance overheads. Choose which disk drives detected on your system are to be used for the installation and hit on Next button to begin the partitioning process

9. The installer will prompt for some networking configuration information once the disk partition and encryption has completed. There are two options such as DHCP and Manual network configuration
DHCP network configuration is for server or device that automatically assigns network IP addresses to computers on the network
Manual network configuration is to have a DHCP server that does not automatically provide clients with host names, select the option to manually specify the host name and enter it into the text box and click Next to proceed

10. Select the appropriate Time Zone corresponding to your geographical location and hit on Next button

11. Provide the Root Password for the root account on the system. The root, or super-user account is a special user that has administrative privileges on the system

12. Select the Linux Package that you want to install or else go with default package that will install standard GNOME based Desktop Installation. Anyhow you can have the following packages and choose the one you want
Desktop GNOME
Desktop KDE
Server GUI
Clustering Storage

13. Select the Additional Software Repositories if required. For this feature you will have to have an active network connection. You can also customize your package and software selection Now or Later. Select the one you want and hit on Enter button

14. The Next screen will prompt you to install the selected CentOS packages and the installation time will vary based on the number of packages and software you have selected. Once the installation process is complete a screen will appear containing a button to reboot the system. Remove the installation DVD and click the button

15. After the system has started for the first time, the CentOS Setup Agent will appear with a welcome message. Click on the Forward button to display the Firewall settings
Leave SELinux configured as Enforcing to ensure the most secure environment
Create a New user account and verify the date and time
Once you have completed all the set up pages, click Finish to exit the setup agent and log in using your newly created user account

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