I have been trying to get RVM properly installed on my system for 10 hours. The problem is, that when ever I run the command to download the install script I get this:

edu@edu-VirtualBox:~$  bash -s stable < <(curl -s https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer)
mkdir: cannot create directory `/usr/share/ruby-rvm': Permission denied

If I run the command with sudo, I can get it installed, but then that leads to a whole host of other issues. Every tutorial I read says that you should not be installing rvm with sudo for a single user install.

Why can I seem to get it installed without running sudo?