If I don't have NetworkManager installed on Debian, I edit "/etc/network/interfaces" and then run
ifup eth0. I see that things are different in Fedora 14 (the directory and the command aren't available). How do I do it?
You can continue to use the 'network' service. Just run
sudo /sbin/chkconfig network on
sudo /sbin/service network start
and it will start the interfaces that are set up in /etc/sysconfig/network-scripts/ifcfg-*. You might want to check the settings in those files to make sure that the interface you want to start automatically on boot is set "ONBOOT=yes". For an interface to edit those files, you can use 'system-config-network' which is part of the system-config-network package (if not already installed).