Client does not support authentication protocol requested by server; consider upgrading MySQL client
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1. ¸ðµç Client ÇÁ·Î±×·¥À» 4.1ÀÌ»óÀ¸·Î ¾÷±×·¹À̵åÇÑ´Ù.
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2. »ç¿ëÇÏ·Á´Â °èÁ¤À» 4.1 ÀÌÀü Client ÇÁ·Î±×·¥°ú Åë½ÅÀÌ °¡´ÉÇÑ ÀÌÀü ºñ¹Ð¹øÈ£ ü°è·Î º¯°æÇÑ´Ù.
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mysql> SET PASSWORD FOR
¡¡¡¡-> 'some_user'@'some_host' = OLD_PASSWORD('newpwd');
Alternatively, use UPDATE and FLUSH PRIVILEGES:
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mysql> UPDATE mysql.user SET Password = OLD_PASSWORD('newpwd')
¡¡¡¡-> WHERE Host = 'DBhost' AND User = 'DBuser';
mysql> FLUSH PRIVILEGES;
3. --old-passwords ¿É¼ÇÀ¸·Î ¼¹ö¸¦ ÀÌÀüºñ¹Ð¹øÈ£ ü°è·Î ½ÇÇàÇÑ´Ù.