Minimal installation of CentOS 7

CentOS 7, minimal installation

To start with the installation of CentOS 7.3, we will need the ISO file. It can be the minimum ISO installation of CentOS or the ISO DVD file. If you plan to install only on this server, choose the minimum ISO since it is smaller, the installer will download the necessary packages during the installation later. Otherwise, if you intend to install on several servers with CentOS 7.3, choose the ISO DVD so you don't have to download the same packages again for each server.

You can download CentOS 7.3 of your choice from the following link: http://ftp.hosteurope.de/mirror/centos.org/7/isos/x86_64/

CentOS 7 DVD: http://ftp.hosteurope.de/mirror/centos.org/7/isos/x86_64/CentOS-7-x86_64-DVD-1908.iso

CentOS 7 CD Minimal: http://ftp.hosteurope.de/mirror/centos.org/7/isos/x86_64/CentOS-7-x86_64-Minimal-1908.iso

If you intend to install on a VMware or VirtualBox virtual machine. The installation steps are the same. If your server cannot boot from an ISO file, burn the ISO to a DVD and insert it into the server's DVD drive.

1. Select Install CentOS Linux 7 and press Entel

instalation minimal the CentOS 7

2. Select the language of our choice for the installation of CentOS 7 and press continue.

instalation minimal the CentOS 7 sellect lenguage

3. In this screen the configuration or installation of resources will depend on our needs but there are three points that must be modified such as: Installation destination, Software selection and Network or Host configuration. We click SOFTWARE SELECTION.

instalation minimal the CentOS 7 install summary

4. By default in the software selection minimal installation is selected, but it is necessary to select library compatibility although we could edit it manually later. We press (Done).

instalation minimal the CentOS 7 sellect software

5. Next we click on INSTALLATION DESTINATION For the configuration of our disk.

instalation minimal the CentOS 7 install summary

6. In these screens we select the destination disk of our CentOS 7 installation, we could leave the default configuration if we are performing an installation in a virtual machine otherwise we could edit our selected disk (I will configure partitioning).

instalation minimal the CentOS 7 instalation destination

7. Press (Done) and edit the configuration of our disk as follows:

We have created three SWAP, BOOT and the rest partitions for the root directory that contains the VAR, HOME, ETC directories ...

SWAP: 5GB, It is advisable to create a swap partition in proportion to the amount of memory of our hardware, that is 5GB of RAM 5GB SWAP.
BOOT: 500 MB
/: The rest of our disk space.

instalation minimal the CentOS 7 eddit destination

8. Press (Dane) accept the changes on our disk. We select NETWORK & HOST NAME.

instalation minimal the CentOS 7 install summary

9. On the next screen we can configure our network and host of our operating system as follows.

Like the configuration of our hard disk, the network and host configuration will depend on our needs, if we are performing an installation on a virtual machine where we are not going to need a static IP address we simply enable the network connection to obtain an address Dynamic IP through the DHCP assignment of our Reuter. In the same way we change the name of our host and click on apply.

instalation minimal the CentOS 7 configuration dinamic network

10. Otherwise, if you are installing on a server, the configuration of a static IP address is required, we could do it as follows by clicking on (configure ...).

instalation minimal the CentOS 7 configuration static network

11. In the next window we select (IPv4 Settings), in method we select (Manual) and add the IPv4 configuration of our preference.
In the configuration of a static IP address it is necessary to know the link IP address of our Reuter.

instalation minimal the CentOS 7 configuration static network

12. Now we go to (IPv6 Settings), in method we select (Ignore) and click on (Save).

instalation minimal the CentOS 7 configuration static network

13. We enable our network, click on (Done) and continue with Begin Instalation.

instalation minimal the CentOS 7 configuration static network

14. On the next screen we assign a password to the ROOT user and create a new USER.

instalation minimal the CentOS 7 Password assignment to the root user and user creation

15. We click on (Finish Configuration).

instalation minimal the CentOS 7 Password assignment to the root user and user creation

16. Restart the system.

instalation minimal the CentOS 7 restart the system

17. We start the session with the user that we have created in our system for the first time and take the root user session with the command (su).

instalation minimal the CentOS 7 Login

18. Once we start the section it is highly recommended to install the tool (net-tools), it will allow us to use essential commands in the configuration and monitoring of our network, it is also very important to update our system.

The installation and updates must be confirmed with “Y”.

# yum update

# yum install net-tools

Other tools that will allow us to download and edit in our system.

# yum install nano vim

# yum install wget

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