Digital Ocean for Ubuntu and Putty

The Ubuntu version of **16.04.5 version is not available**. When I click the URL in the below description, it shows error. So **I install the 16.04.6 version**. Is it okay? 

When I install putty it does not pop on the screen as shown in the Accessing. So is there any alternatives methods to the putty software. Kindly send the link for Ubuntu 16.04.5 version.

Please try to refer this link!