You can host multiple Wordpress sites on a single Linode by following the instructions in this guide.

Now it is possible to host multiple wordpress apps on a single Linode VM using free Abberit Admin panel. To differentiate the apps ona single VM multiple domain names and multiple ports are supported.
There is a public stackscript to quickly setup the VM with Abberit admin panel: https://cloud.linode.com/linodes/create?type=StackScripts&subtype=Community&stackScriptID=759545. Refer to this guide for details: https://abberit.com/docs/guide-app-multiple-wordpress/

I found a way to host multiple WordPress sites on a single Linode. The above 2 answers are quite long and complex.

You can follow this guide to host multiple WordPress websites on one Linode in just few steps.