DOC-5337 added warning about /var mounted with noexec

Author: andy-stark-redis

content/integrate/redis-data-integration/installation/install-vm.md

@@ -134,7 +134,20 @@ sudo ufw reload
 
 ## Installation steps
 
-Follow the steps below for each of your VMs:
+Follow the steps below for each of your VMs.
+
+{{< note >}}RDI installs executable code in the `/var` partition, so you must
+ensure it is mounted without the `noexec` option. Use the following command to
+find any partitions mounted with the `noexec` option:
+
+```bash
+mount | grep noexec
+```
+
+If your `/var` partition is listed in the output from this command, you must remount
+it without the `noexec` option. See
+[Using the mount command](https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/5/html/deployment_guide/chap-using_the_mount_command) in the Red Hat documentation to learn how to remount a partition.
+{{< /note >}}
 
 1.  Download the RDI installer from the
     [Redis download center](https://redis-enterprise-software-downloads.s3.amazonaws.com/redis-di/rdi-installation-{{< rdi-version >}}.tar.gz)