Mysql can be logged in by any user ????

Source: Internet
Author: User
Mysql can be logged in by any user ???? -- Linux general technology-Linux technology and application information. For details, refer to the following section. Today + yesterday I installed mysql four times, but none of them were successfully completed... I am depressed. Now I am logging on through mysql-u user. no matter whether the user is a system user or anything else, I can enter it ..
In addition, you must have the root permission to run this command. You must add sudo to log on. Why ??

Use sudo mysqladmin-u roo password 1234 to set the password for the root user. If no password is specified, the root user cannot enter the password, but other users can enter the password, which is very depressing... What is the problem? Is mysql itself like this?

In addition, if I log on through root or another user, select * from mysql; the system prompts that this databases does not exist... What is the problem? Do I have to reinstall mysql ???

Thank you !!
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