1、Operation DROP USER failed for ''@'location' #操作删除用户失败
mysql删除语句单词写错了，正确的是drop user ''@'localhost'
MariaDB [(none)]> drop user ''@'location';
ERROR 1396 (HY000): Operation DROP USER failed for ''@'location'
MariaDB [(none)]>
2、Access denied for user 'root'@'localhost' (using password: YES)" when trying to connect
用root”@“localhost”访问被拒绝
原因：密码错误
[root@web01 ~]# mysqldump -uroot -p -A >/root/all.sql
Enter password:
mysqldump: Got error: 1045: "Access denied for user 'root'@'localhost' (using password: YES)" when trying to connect
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