Your
website hostings are hosted on webserver and security is the biggest concern on webservers. Shell access in wrong hands can bring down a server and there wont be anything as bad as loosing important data in such case.
I recommend using local system for fullfilling your requirement to work on linux machine. We are thinking of keeping a separate server for those who want shell access at any cost but we will keep some additional cost for such requirement as monitoring such servers is a big task.