Installation of “CentOS 7.0″ with Screenshots

This tutorial will guide you on how to perform a minimal installation of latest version of CentOS 7.0, using the binary DVD ISO image, an installation that is best suitable for developing a future customizable server platform, with no Graphical User Interface, where you can install only the software that you need.

CentOS 7 Installation

Installation of CentOS 7

If you want to find out more about what’s new in this release of CentOS 7.0 holds and download links, I suggest reading the previous article on release announcements:

  1. CentOS 7.0 Features and Download ISO Images

Requirements

  1. CentOS 7.0 DVD ISO

CentOS 7.0 Installation Process

1. After downloading the last version of CentOS using above links or using official CentOS download page. Burn it to a DVD or create a bootable USB stick using LiveUSB Creator called Unetbootin.

2. After you have created the installer bootable media, place your DVD/USB into your system appropriate drive, start the computer, select your bootable unit and the first CentOS 7 prompt should appear. At the prompt choose Install CentOS 7 and press [Enter] key.

Install CentOS 7

CentOS 7 Boot Menu

3. The system will start loading media installer and a Welcome screen should appear. Select your Installation Process Language, that will assist you through the entire installation procedure and click on Continue.

CentOS 7 Booting

CentOS Installer Loading

Select Installation Process Language

Select Installation Process Language

4. The next step, present screen prompt is Installation Summary. It contains a lot of options to fully customize your system. First thing you may want to setup is your time settings. Click on Date & Time and select your server physical location from the provided map and hit on upper Done button to apply configuration.

Select Date & Time and Location

Select Date & Time and Location

5. The next step is to choose your Language Support and Keyboard settings. Choose your main and extra language for your system and when you’re finished hit on Done button.

Select Language and Keyboard

Select Language and Keyboard

Select English Language

Select English Language

6. The same way choose your Keyboard Layout by hitting the plus button and test your keyboard configuration using the right input filed. After you finish setting up your keyboard, again hit on upper Done button to apply changes and go back to main screen on Installation Summary.

Choose Keyboard Layout

Choose Keyboard Layout

Choose English Keyboard

Choose English Keyboard

7. On the next step you can customize your installation by using other Installation Sources than your local DVD/USB media, such as a network locations using HTTP, HTTPS, FTP or NFS protocols and even add some additional repositories, but use this methods only if you know what you’re doing. So leave the default Auto-detected installation media and hit on Done to continue.

Choose Installation Sources

Choose Installation Sources

Auto Detect Installation Type

Auto Detect Installation Type

8. On the next step you can choose your system installation software. On this step CentOS offers a lot of Server and Desktop platform environments that you choose from, but, if you want a high degree of customization, especially if you are going to use CentOS 7 to run as a server platform, then I suggest you select Minimal Install with Compatibility Libraries as Add-ons, which will install a minimal basic system software and later you can add other packages as your needs require using yum groupinstall command.

Software Selection

Software Selection

Select CentOS 7 Minimal Install

Select CentOS 7 Minimal Install

9. Now it’s time to partition your hard-drive. Click on Installation Destination menu, select your disk and choose I will configure partitioning.

Choose Installation Destination

Choose Installation Destination

Installation Device Selection

Installation Device Selection

10. On the next screen, choose LVM (Logical Volume Manager) as partition layout and, then, click on Click here to create them automatically, option which will create three system partition using XFS filesystem, automatically redistributing your hard-disk space and gathering all LVS into one big Volume Group named centos.

  1. /boot – Non LVM
  2. /(root) – LVM
  3. Swap – LVM
Select LVM Partition Type

Select LVM Partition Type

Create Partitions

Create Partitions

11. If you are not pleased with the default partition layout done automatically by the installer you can completely add, modify or resize your partition scheme and when you finish hit on Done button and Accept Changes on the Summary of Changes prompt.

Summary of Partition Changes

Summary of Partition Changes

NOTE: For those users, who have hard-disks more than 2TB in size, the installer automatically will convert partition table to GPT, but if you wish to use GPT table on smaller disks than 2TB, then you should use the argument inst.gpt to the installer boot command line in order to change the default behaviour.

12. The next step is to set your system hostname and enable networking. Click on Network & Hostname label and type your system FQDN (Fully Qualified Domain Name) on Hostname filed, then enable your Network interface, switching the top Ethernet button to ON.

If you have a functional DHCP server on you network then it will automatically configure all your network setting for enabled NIC, which should appear under your active interface.

Set System Hostname

Set System Hostname

Enable Ethernet Interface

Enable Ethernet Interface

13. If your system will be destined as a server it’s better to set static network configuration on Ethernet NIC by clicking on Configure button and add all your static interface settings like in the screenshot below, and when you’re finished hit on Save button, disable and enable Ethernet card by switching the button to OFF and ON, and, then hit on Done to apply setting and go back to main menu.

Enter Network Settings

Enter Network Settings

14. Now it’s time to start installation process by pressing on Begin Installation button and set up a strong password for root account.

Click on Begin Installation

Click on Begin Installation

CentOS 7 Root Password

Select Root Password

Set Root Password in CentOS 7

Enter Root Password

15. After you finish setting up a strong password for root account move to User Creation and create your first system user. You can designate this user to become a System Admin with root privileges using sudo command by checking the box Make this user administrator, then click on Done to go back on main menu and wait for the installation process to finish.

CentOS 7 Installation Process

CentOS 7 Installation Process

User Creation and Set Password

User Creation and Set Password

16. After the installation process finishes, the installer will show a successfully message on screen, demanding to reboot your system in order to use it.

CentOS 7 Installation Complete

CentOS 7 Installation Complete

Congratulation! You have now installed last version of CentOS on your bare new machine. Remove any installation media and reboot your computer so you can login to your new minimal CentOS 7 environment and perform other system tasks, such as update you system and install other useful software needed to run day to day tasks.

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Matei Cezar

I'am a computer addicted guy, a fan of open source and linux based system software, have about 4 years experience with Linux distributions desktop, servers and bash scripting.

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94 Responses

  1. Chirag Nayyar says:

    Thank you I followed the all above steps and successfully able to install Centos 7 in my older laptop.

  2. Tar says:

    I created a Centos VM:

    Filesystem               Size  Used Avail Use% Mounted on
    /dev/mapper/centos-root  9.4G  3.4G  6.0G  37% /
    devtmpfs                 895M     0  895M   0% /dev
    tmpfs                    911M     0  911M   0% /dev/shm
    tmpfs                    911M   11M  901M   2% /run
    tmpfs                    911M     0  911M   0% /sys/fs/cgroup
    /dev/mapper/centos-home  953M  953M  652K 100% /home
    /dev/sda1                497M  163M  335M  33% /boot
    tmpfs                    183M   60K  183M   1% /run/user/1000
    

    I would now like to create an FTP server. I am unable to download the iso since there is not enough space in /home. Do I increase the /home or is it possible to download to the /dev/mapper/centos-home?

  3. Mohamed says:

    Thanks, but I want to install it on my PC to try it. I have 2 partitions NTFS I don’t want to delete it.

  4. ores says:

    Thank you sir, this tutorial really helped me. First I tried to use unetbootin but failed, then I used RUFUS and it worked. I asked permission to rewrite this tutorial to my blog.

    • Ravi Saive says:

      @Ores,

      That’s great, yes Unetbootin sometimes failed, RUFUS always works. Sorry you can’t re-publish this article on your blog.

  5. Matei Cezar says:

    Install CentOS from UEFI, not Legacy, because Windows is surely installed via UEFI. In Windows cmd with admin privileges run: bcdedit

    Identify CentOS efi partition and run:

    bcdedit /set '{bootmgr}' path \EFI\refind\refind_x64.efi
    

    Adjust path with bcdedit output result.

  6. Gary says:

    After booting to the usb i get this:

    Minimal BASH-like line editing is supported. For the first word,
    TAB lists possible command completions. Anywhere else TAB lists
    possible device or file completions.
    
    Grub>  _
    

    Im not using server grade tech.

    I built a custom pc into a 4u server with the following specs:

    -i7 8700
    -MSI Motherboard
    -Samsung 850 PRO (OS Drive)
    -Samsung 850 EVO (Storage)
    -32GB ddr4 ram
    

    Any idea what my issue is? I have tried installing so many times. I have turned on Legacy and turned off secure boot.
    ive tried a different USB and even a different cpu and mobo. ive installed centos 7 on a usb at least 10 times. ive tried minimal, dvd, and everything. NOTHING works. but i can load windows 10 on it no issue haha. Ideas?

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