( Passwords

Info Catalog ( User resources ( User Account Management ( Password security
 5.6.5 Assigning Account Passwords
 Passwords may be assigned from the command line by using the
 `mysqladmin' command:
      shell> mysqladmin -u USER_NAME -h HOST_NAME password "NEWPWD"
 The account for which this command resets the password is the one with a
 `user' table record that matches USER_NAME in the `User' column and the
 client host _from which you connect_ in the `Host' column.
 Another way to assign a password to an account is to issue a `SET
 PASSWORD' statement:
      mysql> SET PASSWORD FOR 'jeffrey'@'%' = PASSWORD('biscuit');
 Only users such as `root' with update access to the `mysql' database
 can change the password for other users.  If you are not connected as
 an anonymous user, you can change your own password by omitting the
 `FOR' clause:
      mysql> SET PASSWORD = PASSWORD('biscuit');
 You can also use a `GRANT USAGE' statement at the global level (`ON
 *.*') to assign a password to an account without affecting the
 account's current privileges:
      mysql> GRANT USAGE ON *.* TO 'jeffrey'@'%' IDENTIFIED BY 'biscuit';
 Although it is generally preferable to assign passwords using one of the
 preceding methods, you can also do so by modifying the `user' table
    * To establish a password when creating a new account, provide a
      value for the `Password' column:
           shell> mysql -u root mysql
           mysql> INSERT INTO user (Host,User,Password)
               -> VALUES('%','jeffrey',PASSWORD('biscuit'));
           mysql> FLUSH PRIVILEGES;
    * To change the password for an existing account, use `UPDATE' to
      set the `Password' column value:
           shell> mysql -u root mysql
           mysql> UPDATE user SET Password = PASSWORD('bagel')
               -> WHERE Host = '%' AND User = 'francis';
           mysql> FLUSH PRIVILEGES;
 When you assign an account a password using `SET PASSWORD', `INSERT',
 or `UPDATE', you must use the `PASSWORD()' function to encrypt it.
 (The only exception is that you need not use `PASSWORD()' if the
 password is empty.) `PASSWORD()' is necessary because the `user' table
 stores passwords in encrypted form, not as plaintext.  If you forget
 that fact, you are likely to set passwords like this:
      shell> mysql -u root mysql
      mysql> INSERT INTO user (Host,User,Password)
          -> VALUES('%','jeffrey','biscuit');
      mysql> FLUSH PRIVILEGES;
 The result is that the literal value `'biscuit'' is stored as the
 password in the `user' table, not the encrypted value.  When `jeffrey'
 attempts to connect to the server using this password, the value is
 encrypted and compared to the value stored in the `user' table.
 However, the stored value is the literal string `'biscuit'', so the
 comparison fails and the server rejects the connection:
      shell> mysql -u jeffrey -pbiscuit test
      Access denied
 If you set passwords using the `GRANT ... IDENTIFIED BY' statement or
 the `mysqladmin password' command, they both take care of encrypting
 the password for you.  The `PASSWORD()' function is unnecessary.
 * `PASSWORD()' encryption is different from Unix password
 encryption.   User names.
Info Catalog ( User resources ( User Account Management ( Password security
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