For those looking to use iproute2 package (replacement for ifconfig etc … tool used underlying by various configuration methods):

To add an ipv6 address to an interface, eg eth0:

ip ad ad 2001:db8::dead:beef/64 dev eth0

To list the addresses:

ip [-6] li sh dev eth0 (with -6 will limit to ipv6 addresses, without will list all, including…

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