Aliyun ubuntu 16.04 supports ipv6

Aliyun: ubuntu 16.04.
springBoot: 1.5.9
declare: I do not have a domain name ~

my attempt:
1 I have applied for an account on it

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ipv6

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/etc/network/interfaces

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ipv6

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netstat -tnlp

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tcp6 udp6~~

dns

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ping6 ipv6.baidu.com
ping

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App needs the support of ipv6. I don"t know how to do it. I don"t know if this server can support ipv6.. Because when I went to this website
http://ipv6-test.com/validate.
for testing, it was invalid because he checked the dns first. But I don"t have a domain name!

Apr.03,2021

is fine < del > the above action is right < / del >
secondly, the sf, question won't let me post, it's been 2 days! I'm helpless, too.

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b323f9-2be28.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b323f9-2be28.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?