1. Mysql startup command:
mysql -uroot -p
2. Mysql version check command:
select version();
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3. View the host command corresponding to the user name:
select user,host from user;
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4. Modify the user's password:
alter user 'username'@'hostname' identified by 'newpwd';
---'username' is the username to be modified, hostname is the host corresponding to the user, and 'newpwd' is the new password
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Modify the new password of user zp to 1234
5. At this time, the permission error is reported
ERROR 1227 (42000): Access denied; you need (at least one of) the SYSTEM_USER privilege(s) for this operation
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Reason: A system_user account type is added in MySQL8.0.16 version. Since the root user does not have the SYSTEM_USER authority, the solution can be solved after adding the authority.
grant system_user on . to 'root';
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6. Refresh privileges
flush privileges;