I have installed Ubuntu Desktop 16.04.4 on ESXi 6.0. Tried to increase the pixel density so that i can view the big Screen on my other 27 inch screen through VMWare client. I tried installing open-vmtools but remained unsuccessful. Then installed VMWare tools by mounting through VMWare client (tools that come with ESXi 6.0 but again remained unsuccessfull. The third try was to download latest VMtools from VMWare website, uploaded to uploaded to the /tmp folder of ubuntu through WinSCP server and then installed as per given procedure on VMWare website. I shut down the Ubuntu VM Increase the Video Card Memory from Default to 16 MB. Restarted Virtual Machine, this time I was getting bunch of options for increasing screen size of the Ubuntu Display and successfully running my VM at resolution of 1440x900 (16:10).