How does apt yum add a source for mysql8? Source.list

how does apt yum add a source for mysql8?
although the official website provides
clipboard.png
, some derivatives don"t seem to work.
how can this be solved by modifying the system"s source.list file?
for example, how can this warehouse be added to source.list, http://mirrors.ustc.edu.cn/my.

Sep.24,2021
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-64f5-1eb3f3e-2496.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1eb3f3e-2496.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?