Unison
Unison File Sync
Unison is a reasonable quick file synchronization tool.
It easily can be setup like a Windows Domain User Roaming Profile.
IPV6
Unison uses so called Profiles to define synchronizations. Until version 4.48 it does unfortunately not support IPV6 addresses.
As a workaround, in order to use the nice Link-Local Addresses, an SSH Host Alias can be set .
~/.ssh/config
Host myHostAlias
HostName fe80::2efe:bebe:fafa:8bfd%%wlp2s0
AddressFamily inet6