I am running a Rails 2.3.8 app on my server, with other depended gems, which usually require old version instead of the new version which supports Rails 3.
I have not been running
apt-get update and
apt-get upgrade on my VPS. I am afraid that running either may upgrade my Rails and other gems to latest version, which will then break my app.
I just wanna update my Ubuntu system, such as security updates and such, without touching any applications.
So, what should I run?