Support for IPv6 is implemented in Linux, but you might still have to do two things:
- Ensure that Ipv6 functionality is enabled, e.g that your kernel have IPv6 related modules loaded or compiled in.
- Where relevant, learn what tools there are which are IPv6 specific versions and ensure those versions are available, e.g: for pinging over IPv4 networks (like the internet as of today) you use 'ping' but for pinging using IPv6, you rely on ping6.
The Linux distributions I have worked with seem to have IPv6 support already configured, out of the box, but I would recommend you to check your Linux box. E.g, check if you have a ping6 command, and check if the 'ifconfig' command list one or more 'inet6 addr' addresses.
(For some distributions you might have to explicitly add support for IPv6, like Gentoo for example. OTOH, in Gentoo you have to explicitly enable anything you want included)