If you can't install software on your VPS it may be that the download is "blocked".
Because servers are connected to the internet 24x7, security tends to heavily restrict what software can be installed without your permission.
So there are two ways to ensure you are able to install or update your software.
(1) Copy and paste from your local PC to the VPS
Ensure the clipboard is enabled in your client software, the software you use to connect to the VPS. Then download the software to your local PC and copy and paste it to the VPS.
(2) Unblock the software downloaded onto your VPS
If you download the software using a browser directly onto your VPS then you may need to unblock the software.
To unblock the software, download it to the VPS and make a note of where that file is located.
Then right-click on the icon and locate the 'Unblock' option on the bottom right of the dialogue box. Click to unblock the software and you should be able to run the application.