How to Setup DKIM (DomainKeys) with Postfix on CentOS

Step 1 – Install DKIM-milter First make sure you have enabled EPEL repository in your system. CentOS 8: $ yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm $ dnf config-manager --set-enabled PowerTools CentOS 7: $ yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm After that install dkim-milter package using following…

How To Install MariaDB on CentOS 8

Step 1 — Installing MariaDB First, use dnf to install the MariaDB package: $ sudo dnf install mariadb-server You will be asked to confirm the action. Press y then ENTER to proceed. Once the installation is complete, start the service with systemctl:      …

How To Add and Delete Users on CentOS 8

Prerequisites This tutorial assumes you are logged into a CentOS 8 server with a non-root sudo-enabled user. If you are logged in as root instead, you can drop the sudo portion of all the following commands, but they will work either way. Adding Users Throughout…

How To Set Up SSH Keys on CentOS 8

Step 1 — Creating the RSA Key Pair The first step is to create a key pair on the client machine (usually your local computer): $ ssh-keygen By default, ssh-keygen will create a 2048-bit RSA key pair, which is secure enough…