This document show the steps to install and configure 10 Intel NUCs with OS Centos 7 and a Informix 12.10 Database Server.

The NUC computers are equiped with:

  • 4 Cores (8T), i7-8650U CPU @ 1.90GHz, 8MB cache
  • 32GB 2G x 64-Bit, DDR4-2666 CL15 260-Pin SODIMM

1 Enable remote access

Power on the Intel NUC. Press CTRL+P at the splash screen to enter MEBx BIOS.

Change the default password. The default password is "admin". The new password has the comply with the following policies:

  • At least 8 characters.
  • At least one digit character (eg. 0, 1, … 9).
  • At least one non-alpha-numeric character (e.g. !, $, ;) excluding colon, comma or quotes.
  • At least one lower-case letter (a, b, c, d...).
  • At least one upper case letter (A, B, C, D,...).
  • At least 8 characters

The AMT system uses DHCP to configure an IP Address.

If you do not have a DHCP server you can configure a static IP within Intel AMT Configuration > Network Setup > TCP/IP Settings.

An then enable the Activate Network Access indicator.

Now the Web interface is available at port 16992, use a browser with the URL to connect to the interface:


The user is "admin". Log in once to verify that it is available and properly configured.

To connect via VNC it is necessary to use a VNC viewer that supports Intel AMT KVM mode as VNC Viewer Plus. Don't use TLS encryption to establish the connection.

1.1 Enable Display Emulation

Enable the "Display Emulation" option with the value "Headless displya emulation" on the BIOS to allow the video output for the VNC connection.

  1. Press "F2" on init screen
  2. Go to Advanced option menu
  3. Go to Devices option menu
  4. Select "Headless display emulation"

Finally select the key "F10" to "Save and Exit".

2 Setup Legacy BIOS

By default the UEFI BIOS is active at the system. In order to allow an installation from a non UEFI Bootable disk, change to Legacy BIOS at Setup.

Enter to the BIOS panel configuration by click on Setup option on the top of the right when the server power on.

Enable the Legacy boot and disable UEFI boot option.

3 Install CentOS 7

Donwload the ISO of the CentOS ISO latest minimal version and create a USB disk bootable with the image downloaded. Insert the USB on the machine and Power On.

3.1 Partitions

For a 1TB disk we propose this configuration

Partition Type Size
/ ext4 24GB
swap swap 2GB
/var ext4 24GB
/home ext4 24GB
/data ext4 The remaining size (900GB aprox.)

3.2 Configue the network

Configure the network settings with nmtui utility.


3.3 Set the hostname

hostnamectl set-hostname nuc01

Choose the hostname for the machine (nuc01).

3.4 Upgrade

Upgrade to the last version the installed packages using the instruccion:

yum upgrade

3.5 Upgrade Kernel

3.5.1 Checking Installed Kernel Version

When we install a distribution it includes a certain version of the Linux kernel. To show the current version installed on our system we can do:

uname -sr

3.5.2 Upgrading Kernel in CentOS 7

To enable the ELRepo repository on CentOS 7, do:

rpm --import
rpm -Uvh

Once the repository has been enabled, you can use the following command to list the available kernel.related packages:

yum --disablerepo="*" --enablerepo="elrepo-kernel" list available

Next, install the latest mainline stable kernel:

yum --enablerepo=elrepo-kernel install kernel-ml

Finally, reboot your machine to apply the latest kernel, and then select latest kernel from the menu as shown.

Login as root, and run following command to check the kernel version:

uname -sr

3.5.3 Set Default Kernel Version in GRUB

To make the newly-installed version the default boot option, you will have to modify the GRUB configuration as follows:

Open and edit the file /etc/default/grub and set GRUB_DEFAULT=0. This means that the first kernel in the GRUB initial screen will be used as default.

GRUB_CMDLINE_LINUX=" crashkernel=auto rhgb quiet"

Next, run the following command to recreate the kernel configuration.

grub2-mkconfig -o /boot/grub2/grub.cfg

Reboot the server to use the lastest kernel

Reboot ("init 6" or "shutdown -r now") and verify that the latest kernel is now being used by default.

3.5.4 Removing the Old Kernel

Search for the old kernel (the output can be different depending the source installation)

rpm -qa | grep kernel

and remove the packages for the old version as for example

yum remove kernel-3.10.0-862.el7.x86_64
yum remove kernel-3.10.0-862.14.4.el7.x86_64
yum remove kernel-tools.x86_64
yum remove kernel-tools-libs.x86_64

3.6 Disable Firewall and Selinux

We recommend disable the Firewall and Selinux in order to make easy the configuration of services. This option must be adapted to the security requirements of your environment.

To disable Firewall type:

systemctl disable firewalld
systemctl stop firewalld

To disable Selinux edit the file /etc/selinux/config and modify the SELINUX attribute with the value disable:

# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
#     enforcing - SELinux security policy is enforced.
#     permissive - SELinux prints warnings instead of enforcing.
#     disabled - No SELinux policy is loaded.

4 Enabling VNC in vPro NUC Servers

To enable the standard VNC connection you can install the package wsmancli. There is more information in this site Intel AMT on Linux for remote control/fencing and here How to remotely access Intel AMT KVM from Linux desktop

yum install wsmancli

You can use the following shell to activate the VNC access via vPro. Modify the

  • [AMT_IP_ADDRESS]: The IP of the AMT service configured on the previous section.
  • [AMT_PASSWORD]: The password for "admin" user of the AMT service configured on the previous section.

For the VNC connection we propose the password 'P*ssw0rd', 'P@ssw0rd' or 'In9tel@p', you can use another one but there are requirements that must have the key, as for example a 8 character long, mixcase, must contains numbers and at least one special symbol.

Copy this shell in another server (not on the NUC) with connection to the NUC via ethernet using the IP [AMT_IP_ADDRESS] in order to activate the service.

# Name:
# Purpose : Control remote server/laptop/desktop using KVM and VNC client
# Deister,S.A.
# ----------------------------------------------------------------------
# sudo dnf install wsmancli
xVNC_PWD='P*ssw0rd' # random but must be 8 character long
wsman put -h $xIP -P 16992 -u admin -p ${xPASSWORD} -k RFBPassword=${xVNC_PWD}
wsman put -h $xIP -P 16992 -u admin -p ${xPASSWORD} -k Is5900PortEnabled=true
wsman put -h $xIP -P 16992 -u admin -p ${xPASSWORD} -k OptInPolicy=false
wsman put -h $xIP -P 16992 -u admin -p ${xPASSWORD} -k SessionTimeout=0
wsman invoke -a RequestStateChange -h ${xIP} -P 16992 -u admin -p ${xPASSWORD} -k RequestedState=2
echo "Open Linux vnc client. Use \"$xIP:$xVNC_PORT\" as host and when promoted enter \"$xVNC_PWD\" as password"

Execution of the shell

This shell must be executed from a external server, not on the NUC.

5 Install additional software

Package Description
bc The shell calculator.
gcc The C compiler.
git Git distributed version control system.
libaio Kernel AIO required to allow Informix KIO.
iotop List the processes that are performing I/O, alongwith the disk bandwidth they are using
dstat ore user-friendly version of iostat

To install a package login as root and use yum

# yum install gcc

6 Setting timezone and date

This section will demonstrate how to setting Up NTP (Network Time Protocol) Server in RHEL/CentOS 7.

Network Time Protocol – NTP- is a protocol which runs over port 123 UDP at Transport Layer and allows computers to synchronize time over networks for an accurate time. While time is passing by, computers internal clocks tend to drift which can lead to inconsistent time issues, especially on servers and clients logs files or if you want to replicate servers resources or databases.

6.1 Prerequisites

Before anything else, you need to assign the correct time zone.

To get the current configuration


To get the list of all the available time zones:

timedatectl list-timezones

To set your time zone you can use command below: (e.g. Madrid)

timedatectl set-timezone Europe/Madrid

6.2 Install and configure NTP daemon

You can install and configure NTP server on CentOS/RHEL 7 and automatically synchronize time with the closest geographically peers available for your server location by using NTP Public Pool Time Servers list.

NTP server package is provided by default from official CentOS /RHEL 7 repositories and can be installed by issuing the following command.

yum install ntp

The NTP configuration is in the /etc/ntp.conf file.

6.3 Add Firewall Rules and Start NTP Daemon

If you've configured the firewall you must allow UDP traffic for the NTP service in order to communicate with the NTP pool

firewall-cmd --add-service=ntp --permanent
firewall-cmd --reload

Once the installation completes, start the service and configure it so it starts automatically each time the server boots. Use the following commands to manage the service.

systemctl start ntpd
systemctl enable ntpd
systemctl status ntpd

6.4 Verify Server Time Sync

After NTP daemon has been started, wait a few minutes for the server to synchronize time with its pool list servers, then run the following commands to verify NTP peers synchronization status and your system time.

ntpq -p
date -R

7 Inspect CPU settings

[informix@nuc00 data]$ cat /proc/cpuinfo
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 142
model name	: Intel(R) Core(TM) i7-8650U CPU @ 1.90GHz
stepping	: 10
microcode	: 0x96
cpu MHz		: 1000.012
cache size	: 8192 KB
physical id	: 0
siblings	: 8
core id		: 0
cpu cores	: 4
apicid		: 0
initial apicid	: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 22
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 ibpb ibrs stibp dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp
bogomips	: 4224.00
clflush size	: 64
cache_alignment	: 64
address sizes	: 39 bits physical, 48 bits virtual
power management: