aaP_dcunningham
For me same problem. Oracle free tier, Ubuntu 20.04
The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
127.0.1.1 instance-20220627-0747 instance-20220627-0747