Is there is something like a Rosetta Stone for the different Linux Distributions?
Perhaps a site where you can look up a commands, configuration files or problem solutions for a specific task organized as translations of ones of another distribution (you know well).
For example you know Debian based distributions well and you want to know the Fedora equivalent to
dpkg -S /bin/bar
dpkg --get-selections > foo dpkg --set-selections < foo
apt-cache search foobar --names-only
There is a Rosetta Stone for different Unices, but it is not that detailed and does not really differentiates between different Distributions.