Centos 7 Minimal Iso Download

I am starting with CentOS 7 minimal install, but the steps should. CentOS 6, CentOS 7 and Scientific Linux 6 and Scientific. Use the following links to download the latest CentOS 7 ISO images from CentOS official download page or its mirror pages. Download the latest NVIDIA driver for unix.
The post is written keeping in mind you have installed RHEL/CentOS Minimal Install which is preferred in Enterprise and production environment, if not you can follow below guide that will show you minimal installations of both. Installation of CentOS 7 Minimal; Installation of RHEL 7 Minimal.

Centos 7 Minimal Iso Download Windows
Centos 7 Minimal Iso 32 Bit Download
Centos 7 Minimal Iso Download
Centos 7 Minimal Iso Download 1708

Updated article as of November 2017 at the URL below.

Netinstall - Minimal CD image to start network installations (iso will only work with the corresponding point release, eg one cannot use the netinstall from CentOS Linux 6.2 to install CentOS Linux 6.3. Archived Versions. Base Distribution. No information is available for this page.Learn why.

Revised: March 31, 2016. Added the 'Note' below. No other changes.

Revised June 9, 2016. Provide link to newer document for CentOS 7.2.1511.

The purpose of this guide is provide the steps to build a standardized CentOS 7 build 1503 aka Red Hat Enterprise Linux (RHEL) 7.1 Minimal x86_64 base operating system.

Note

I am observing changes between minor versions that are significant. More specifically Red Hat's emphasis on systemd, firewalld, and NetworkManager (<-- ICK!). Future guides will provide specify the version in the title to distinguish them from each other.

CentOS-7 (1503) Release Notes can be found HERE: http://wiki.centos.org/Manuals/ReleaseNotes/CentOS7

CentOS FAQ can be found HERE: http://wiki.centos.org/FAQ/CentOS7

Base CentOS Installation Task Overview

Obtain media
Virtual Machine Creation
CentOS Installation
Network Interface configuration
Name Resolution configuration
Network Manager Text User Interface
Verify operation
Hostname settings
Time zone
Time
EPEL
Virtual Machine Drivers
Update

Obtain media

If you are new to Linux or new to CentOS minimal installations, I would advise reviewing all the information at the URL below. Otherwise, scroll down and select the download URL under section 2. We will be using x86_64 version, also, known as 64 bit. The 32 bit version should work as well.

Download: http://wiki.centos.org/Download

Virtual Machine Creation

Below describes how to create a virtual machine using VMware Workstation or ESXi, but may apply to other virtualization products.

After download of the installation ISO, create a new virtual machine specifying the following:

CentOS 64 bit
1 CPU
1 GB RAM
NAT (or Bridge) network adapter
20 GB, LSI Logic SAS, SCSI Disk

Note when creating a 'New Virtual Machine' in VMware Workstation 11 using 'Typical' will use the specifications above. If you have the resources available, increase CPU and RAM to 2 and 2048, respectively, but it is not a requirement. Do not enable the 'power-on' on completion.

In addition, customize hardware and remove the following:

USB Controller
Sound Card
Printer

If you did not mount the CentOS 7 installation media during the creation of the virtual machine, do so before moving to the next step.

Next, use the 'power-on to firmware' or BIOS feature to disable all unneeded devices. With VMware Workstation and ESXi, I disable Legacy Floppy A, then under 'Advanced' and 'I/O Device Configuration' disable all items:

Serial ports
Parallel port
Floppy controller

Exit saving changes. After the power cycle, CentOS 7 installation should begin.

Note:

Selecting 'Typical' installation method when creating a new virtual machine using VMware Workstation 11 (and ESXi 5.5?) will generate errors regarding missing packages. I suspect this is due to the wizard and either using the 'Minimal' installation media or changes from the initial release of CentOS 7 and CentOS 7 build 1503. I prefer to use 'Custom' not 'Typical' which does not result in errors.

Installation

Boot from media and, generally, accept the defaults. You have an opportunity to provide time zone, a host name, configure network interfaces, provide DNS IP addresses, domain search, etc. If configured at this point, the installation script automatically configures the resulting installation using these settings. It is a time saver, however, I am going to assume these setting have not been set or changes will be needed.

Note:

During installation and under 'Installation Source' you have an option or button 'Verify' to run a 'Media Verification.' If this is your first use of the media, I advise using this feature. Nothing worse then losing hours or days to corrupted installation media. If you have previously verified the media at its current storage location, you can, generally, safely skip verification.

Network interface settings

To review you current active interfaces, execute ip addr. For example:

Note:

CentOS 7 no longer uses the naming convention previously used for network interfaces, e.g. eth0 or eth1. It now uses a designation as provided by the system BIOS. In the examples, eno16777728 is equivalent to interface eth0 found with CentOS 6 which results with the configuration file ifcfg-eno16777728 versus ifcfg-eth0.

Reference: http://wiki.centos.org/FAQ/CentOS7#head-62d45421abea0220e3038796e3dd5315906fa493

The default configuration for the network interface, eno16777728, is given below. You may have a different DEVICE and will have a different UUID.

If you desire to use DHCP, update ifcfg-* using ONBOOT value from no to yes, save, then restart network services.

Results

Restart network service:

Results with the following:

If you are going to use a static IP address, then you will need to update ifcfg-eno6777728 appropriately. Note you may use nmtui instead which I will provide basic instructions to follow.

Restart the network service

Additional references:

Name Resolution settings

Configure DNS resolution settings. Current settings shown below are a result of using DHCP, initially. Your resolv.conf may differ.

Update resolv.conf using vi and provide DNS IP addresses and domain suffix search order.

Network Manager Text User Interface (nmtui)

For network interface and name resolution settings, nmtui is an alternative to editing configuration files by hand.

Execute nmtui

Select 'Edit a connection'

Update the connection with the appropriate settings. Note the use of CIDR notation after the Addresses, e.g. '/24', which will need be specified if sub- or super-netting.

Select <OK> then restart the network service to apply the changes

Results with:

Verifying operation

Use ping to verify basic interface, routing, and name resolution operation.

Hostname settings (formerly known as 'Network settings')

I kept this section in this article for I suspect others may look to make host name changes utilizing /etc/sysconfig/network as was previously versions of CentOS 6. Don't! Use nmtui instead and select 'Set system hostname.'

Default settings after installation are as follows:

In addition, executing hostname results with:

Using nmtui and setting the host name to '2fcosrad7.2factor.net' results with:

###Hosts settingsEditing this file is not strictly required for DNS can be utilized to resolve the host. It is my personal preference to utilize /etc/hosts for hosts to resolve themselves.

Note the current settings.

Update the host name:

Testing with ping prior to the change and without a DNS record will fail, but testing after editing /etc/hosts will now result with success.

##Time zoneReminder to the author: NEED TO UPDATE TO SHOW A CHANGE IN TIME ZONE, e.g. New_York to Los_Angeles

After installation, the default time zone is America/New_York. CentOS 7 uses timedatectl to manage time and date related settings.

Check current settings using timedatectl

Find your time zone

Set your time zone

Results

References:

##TimeTime synchronization can play a big role in kerberos authentication and other services.

Install NTP package:

Results with

Configure NTP:

Comment out the existing lines with 'server' then add one line for time source. If integration with Microsoft Windows Active Directory, it is advisable to use the IP address or host name for each domain controller or use the time sources used by the domain controller with the FSMO PDC Emulator role.

Start NTP

Enable NTP

Test NTP

##Virtual Machine DriversAssuming you are using CentOS on a virtual machine, it is advisable to install virtual machine drivers. Not a requirement, but you will, otherwise, lose functionality with most virtual machine technology solutions. I use open-vm-tools, but it is my personal preference. See this article explaining my reasons why: https://github.com/rharmonson/richtech/wiki/CentOS-6-and-7-&-Virtualization-with-VMware-=-open-vm--tools.