There are some links which may help I hope:
How to Install an Earlier Purchased Applicationhttps://www.metatrader5.com/en/terminal/help/market_buy
Forum on trading, automated trading systems and testing trading strategies
How to Start with Metatrader 5
Sergey Golubev, 2016.04.10 11:42
Where can I see my purchases?
The "Purchased" tab displays all the products downloaded and purchased using the current MQL5.community account.
If MQL5.community account data are not specified in the platform
settings, the tab name changes to "Downloads". It displays all downloads
and purchases made in the current trading platform regardless of the
Cannot download market EA on VPS
Sergey Golubev, 2016.10.01 15:41
Failed download of Market product to VPS terminal
Sergey Golubev, 2016.09.08 14:37
If this is mql5 VPS so it should work too.
As I know (MQ reported) tha Signal service does not work on Linux (may be - same for the Market products):
As to MQL5 VPS so I have the following information:
Need to activate my purchased EA on my VPS
Sergey Golubev, 2016.06.11 08:27
There are similar questions were asked there: Questions about VPS configuration so I am suggesting to you to read those thread (there are some usefull links/small articles to read).
As to product purchased on the Market :