# Operating System Requirements The following Linux-based Operating Systems are supported for running a validator node: * Ubuntu Server 18.04 LTS or later * Debian 9.8 or later * CentOS 7 or later * RedHat Enterprise Linux 7.4 or later Validators can elect other operating systems at their discretion, but may need to customize the installation scripts. Contact for questions and support. The following section provide a comprehensive guide for installation of one the supported operating systems. All further deployment procedures are based on the installation results. ### **Ubuntu Server 18.04 LTS** **On-Premise** Procedure based on version 18.04.2. * Download the ISO from .
* Boot the ISO * Select **English** as language * Choose a convenient keyboard layout * Choose **Install Ubuntu** * Let the network auto-configure -or- configure manually if needed. The system needs an internet connection. * Select no proxy and keep the mirror address. * Select **Use an entire disk** and confirm * Choose user name and host name in next screen. Choose a strong password. * Select **Install OpenSSH Server** but don’t import keys * Don’t select any snaps and continue * Finish installation and let it boot to the prompt * Login as the created user and run a full system update using `sudo apt-get update && sudo apt-get dist-upgrade -y` **Amazon AWS** Ubuntu AMI's are listed at . Search for "ebs 18.04 amd64" to get the right version. **Microsoft Azure** The URN for the image is **Canonical:UbuntuServer:18.04-LTS:latest** ### **Debian 9.8** **On-Premise** * Download the NetInst ISO from * Boot the ISO * Select **Install** from the boot screen * Select **English** as language * Select Location based on actual location of the host * Chose a convenient keyboard layout * Let the network auto-configure -or- configure manually if needed. The system needs an internet connection. * Name your host. Change it from debian to something else * Choose a strong root password * Create the user account and choose a strong password * Select the proper timezone * For the partitions use **Guided - use entire disk** * Select **All files in one partition** * Finish partitioning and write changes to disk * Select **No** when ask to scan more disks * Choose a mirror close to the host * Opt-out of the package survey * on the **Software Selection** select only **SSH Server** and **standard system utilities** * Install the grub bootloader to MBR and use the primary disk for that * Finish installation and let it boot to the prompt * Login as root and run a full system update using 'apt update && apt dist-upgrade -y' * Reboot **Amazon AWS** The AMI Id's can be found at **Microsoft Azure** The URN for the image is **credativ:Debian:9:latest** ### **CentOS 7** **On-Premise** * Download the minimal ISO from * Boot the ISO * Confirm the automatic boot option **Test this media & install CentOS 7** * Choose **English** as language * On the installation summary choose **Installation destination** and confirm **automatic partinioning** * Back on the installation summary screen click on **Network & Hostname** * Change the hostname * Enable the network interface and make sure it is configured properly * Click **Done** to get back to the summary and click **Begin Installation** * During installation set a root password * Finish installation and let it boot to the prompt * Login as root and run a system update with 'yum update' **Amazon AWS** The AMI Id's can be found at **Microsoft Azure** The URN for the image is **OpenLogic:CentOS:7.5:latest**