Linux System Activity Reporter (SAR) is often used by system administrators to check the resource utilisation and health report at a particular point of time. In order to install SAR on a RHEL/CentOS based machine, first we need to install EPEL repo on the server, you can do the same by running the below command on the terminal

yum install epel-release -y

The parent package of SAR is systat, sysstat is a bundle of few useful tools including SAR, once the repo is installed we can continue with the SAR installation by executing the below command

yum install sysstat -y

We can check if the service is running or not by executing the below command

service sysstat status

You can check the following post to analyse the system health using SAR.