If you have earlier versions of vCLI installed on RHEL, you must remove those installations before installing the latest version.
Run the uninstall script, for example, if you installed vCLI in the default location, run the following command.
/usr/bin/vmware-uninstall-vSphere-CLI.pl
Delete existing versions of vSphere-CLI.xxxx.tar.gz and delete the vmware-vsphere-cli-distrib directory.
Install vCLI on RHEL.