I am logged in with my admin account, which is my only account on this computer. I checked under preferences and it says "admin".
I have located the file here:
/private/etc/hosts
When I go to getinfo, it looks like the file is not locked. I also added myself and for good measure everyone with r&w permissions:
Still, when I open it and try to edit it, it says I have no permission:
What am I doing wrong here?