On OpenSUSE 10.3, turning off IPv6 via yast requires a reboot - is there any way not to reboot the system and turn off IPv6? Also, even after rebooting the system there are IPv6 entries in /etc/hosts file - why is that? And how do I make sure IPv6 is really turned off?
Those entries are harmless. If you don’t have IPv6 networking enabled in the kernel, you don’t have IPv6 traffic anyway. Edit them out if it makes you feel better, but there’s no need to worry about /etc/hosts.