Situation

When Use apt update, Can Not Resolve IPv6 Address.

Solution

apt With -o

Use -o Acquire::ForceIPv4=true update -o Acquire::ForceIPv6=true update

Setting APT Conf

Edit

/etc/apt/apt.conf.d/99force-ipv4

ADD

Acquire::ForceIPv4 "true"; <- IPv4

Or

Acquire::ForceIPv6 "true"; <- IPv6