I help manage an Ubuntu 14.04 virtual server (I think it's VMWare) that has never had problems but today the root filesystem is read-only for some reason. It's a production webserver that is now down because of that.
I don't control the VMWare backend. A colleague mentioned last week to be careful not to break any servers because the main backup server needed to be rebuilt. I think he has an alternative but I don't know the status of it. I am in a different time zone and would have to wait many hours to check to confirm that there is a good backup.
Given these circumstances, I'm not sure if I should try to remount the root filesystem or not until I can talk to the backend people. There's pressure to get the websites back up, but I don't want to break anything in the process, especially if I don't know if there is a good backup.
My question is, is there any danger in attempting to remount the filesystem as read/write?