Need a system tweak or is it a bug on the server?

Question

SSH

Some details can be found here: How to get remote access to a server (ubuntu) and run a website on it?
I can summarize this way: there is a server. Got access to it via ssh*.
Commands
curl -O http://vestacp.com/pub/vst-install.sh
sudo tasksel install lamp-server
Return errors. As I understand it, they are associated with connecting to remote resources to download files.
If I connect to a server via ssh, then I have Internet access.
What is the problem?

Answer 1

The answer depends on what specific errors are returned.
For the first command, there must be another one that will install the necessary software. RTFM.
In this case, the second command, if the scripts of the first one are correctly executed, is optional.