On CentOS 6 hosts, you need to install python34 first

{{{
yum install python34
}}}
On both CentOS 6 and Rocky 9:

{{{
cd
wget http://mirror.binarylane.com.au/tools/mpanel-memory-graph.tar.gz
cd /
tar xvzf /root/mpanel-memory-graph.tar.gz
}}}
Try to run it

{{{
/usr/local/bin/mpanel-memory-graph
}}}
If the prompt comes back with no output then it means it worked.  (i.e. no python errors, etc).

A cron job is added to /etc/cron.d/mpanel-memory-graph .  Delete the 2 files to uninstall.