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1. Install Fail2Ban   Because Fail2Ban is not available from CentOS, we will have to install EPEL repository first. The following commands must be executed after switching to the root user. yum install epel-release Follow up by installing Fail2Ban: yum install fail2ban fail2ban-systemd   2. Running Fail2Ban service   Execute the following command lines to … Read more

hostnamectl –static set-hostname yourhostnamegoeshere now you need to restart the service systemctl restart systemd-hostnamed and finally check your new name with hostname