CentOS 6.3 Step by Step Installation Guide with Screenshots

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Narad Shrestha

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108 Responses

  1. Nils says:


    I am completely new to Linux and CentOS. Could you explain why my USB keyboard gets disabled at step 2? I cannot complete the CentOS installation because of that.

    Thank you for your help.

  2. indifferent says:

    hello Ravi,
    i’m having trouble installing CEntOS 6.3. i have just enrolled for the course of LINUX , and as our instructor guided, we didn’t have to go for configuring network and at ‘step 13’ we chose ‘Create Custom Layout’, then after clicking on ‘Next’ tab the window appears with following data

    sda1 (ntfs) 100MB
    sda2 (ntfs) 102410MB
    sda3 (ntfs) 204809MB
    sda4 (ntfs) 100616MB
    Free 69002MB

    I select ‘Free’ in this step , then click ‘Create’ tab.

    A window named ‘Standard Partition’ appears and then again click on ‘Create’ tab

    Then the ‘Add Partition’ window arrives, there I select as below for the first selection:

    Mount Type : /
    File System Type : ext4
    Allowable Drives : (The name of my HDD with its size showing as sda with check marked but disabled)
    Size(MB) : 40000

    after this when i click OK the error msg appears saying ‘Could not allocate requested partitions: not enough free space on disks’. why this error msg appears ? when we tried to install in our classroom pc there was no such trouble.

    my default OS is Windows 7 Professional 64-bit


    (C) Healthy (Primary ….) 65.06GB free of Capacity 100.01GB

    (D) Healthy (Primary ) 25.17GB free of Capacity 200.01GB

    (E) Healthy (Primary ) 34.11GB free of Capacity 98.26GB

    (System Reserved) Healthy (Primary ) 33MB free of Capacity 100MB

    Unallocated __________________________________________________________ 67.38GB

    do i have to increase the unallocated space ? 67.38GB is not enough for CEntOS 6.3 ?

    • Ravi Saive says:

      Please follow below instructions. First create /boot partition with size 300MB and then create swap partition as partition type Swap and then create / Partition and allocate all size..it will work..

  3. George says:

    Hello Mr.Ravi

    I managed to install CentOS well, but i want to use USB Modem to access internet without success, any help please.

  4. Anonymous says:

    Hi sir,
    I am completely new to all these concepts… please tell me where to place thse iso files after downloading them so that while booting system detects it?? and aslo how to identify the vacant drives from the names hda hdb and so on??

    • Ravi Saive says:

      After downloading filees make a bootable DVD or USB stick of these files and boot the system using bootable media.

  5. Srini says:

    Hi Ravi,

    Very nice presentation. I am looking similar presentation or documents for configuring Centos desktop with Centos server with Domain, Active directory config, DNS server. I want to use the server for user authentication purpose.

    Thanks and Regards,


  6. nilesh says:

    I have installed CentOS 6.2. But at the time of Package selection, only default are checked. But now i want to select other packages too.

    How to do the same. I have CentOS installation CD

    • Ravi Saive says:

      Please insert the CentOS installation CD and install software packages from Software Selection application, you will find under Application menu somewhere.

  7. Sandeep says:


    i am using windows 8 with VMware 6 and installed centos 6.4 with 768 MB memory.

    i am very new to Linux…but successfully installed CentOS.
    I have following doubts please clarify
    1) when i boot my centOS i am just getting Command line with Username and password. i can log in no problem with that. How can i get a GUI display???
    2) now on this CentOS i want to install asterisk 3.0 How can i acheive that ?? i have Asterisk setup already downloaded in ISO image…Please guide



    • Ravi Saive says:

      For your first point, run the following command to get GUI.

      # init 5

      For second point, search asterisk article using our search form at the top right corner.

  8. Kim says:

    Very nice tutorial :) Thanks

  9. harish says:

    hi guys,
    i am very much interested to learn the linux, so currently i’m using Centos flavour in linux while practising the Centos i’m getting lot of doubts in my dialy practical scenario, so here my doubt is that when i’m creating partitions automatically it’s taking 4 partitions . so could anyone please explain why its taking 4 partitions when i’m creating only one ???

  10. Amir Mahjouri says:

    Dear sirs,
    thanks very nice for your tutorial ;
    But I want to know Difference oracle linux with centos.
    and how clustering-system on linux centos?

    thank you very much

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