To install RRDTool on Red Hat Enterprise Linux (RHEL), you will need to have root privileges or access to a user with sudo privileges.
sudo yum update
sudo yum install epel-release
sudo yum install rrdtool
rrdtool --version
That's it! RRDTool should now be installed on your RHEL system. You can use it to create and maintain Round-Robin Databases (RRDs), which are used to store and display time-series data.
Note: If you are using an older version of RHEL that does not have the EPEL repository available, you can install RRDTool from a package file (".rpm") instead. You can download the appropriate package file from the RRDTool website (https://oss.oetiker.ch/rrdtool/download.en.html) and install it using the "rpm" command. For example:
sudo rpm -i rrdtool-1.7.0-1.el7.x86_64.rpm
Replace "rrdtool-1.7.0-1.el7.x86_64.rpm" with the name of the package file that you downloaded.