mysql怎么重建本地用户及远程用户

这篇文章主要介绍“怎么重建本地用户及远程用户”，在日常操作中，相信很多人在mysql怎么重建本地用户及远程用户问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答”mysql怎么重建本地用户及远程用户”的疑惑有所帮助！接下来，请跟着小编一起来学习吧！

一、模拟删除破坏用户：
laojiang:~ # mysql -uroot -proot
mysql> use mysql;
mysql> select user,host from user;
+----------+------------+
| user     | host       |
+----------+------------+
| laojiang | %          |
| laojiang | 127.0.0.1  |
| root     | 127.0.0.1  |
| root     | ::1        |
| root     | laojiang |
| laojiang | localhost  |
| root     | localhost  |
| laojiang | laojiang  |
+----------+------------+
8 rows in set (0.00 sec)
mysql> delete from user where user='root';
Query OK, 4 rows affected (0.00 sec)
mysql> select user,host from user;
+----------+-----------+
| user     | host      |
+----------+-----------+
| laojiang | %         |
| laojiang | 127.0.0.1 |
| laojiang | localhost |
| laojiang | laojiang |
+----------+-----------+
4 rows in set (0.00 sec)
mysql>

laojiang:~ # service mysql restart
Shutting down MySQL..                                                                                                                                                 done
Starting MySQL.                                                                                                                                                       done
laojiang:~ # mysql -uroot -proot
Warning: Using a password on the command line interface can be insecure.
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
laojiang:~ #

二、重建本地用户：
laojiang:/etc # vi my.cnf
[mysqld]
skip-grant-tables
laojiang:~ # service mysql restart
Shutting down MySQL..                                                                                                                                                 done
Starting MySQL.                    

laojiang:~ # mysql -uroot -p
Enter password:
mysql> insert into mysql.user (host, user, password,ssl_cipher,x509_issuer,x509_subject) values ('localhost', 'root', password('root'),'','','');
Query OK, 1 row affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> grant all privileges on *.* to 'root'@'localhost' identified by 'root' with grant option;
Query OK, 0 rows affected (0.00 sec)
mysql>

laojiang:/etc # vi my.cnf
[mysqld]
#skip-grant-tables
laojiang:~ # service mysql restart
Shutting down MySQL..                                                                                                                                                 done
Starting MySQL.                                                                                                                                                       done

三、通过本地用户重建远程用户：
laojiang:~ # mysql -uroot -proot
mysql> select user,host from mysql.user;
+----------+-----------+
| user     | host      |
+----------+-----------+
| laojiang | %         |
| laojiang | 127.0.0.1 |
| laojiang | localhost |
| root     | localhost |
| laojiang | laojiang |
+----------+-----------+
5 rows in set (0.00 sec)

mysql>  grant all privileges on *.* to 'root'@'%' identified by 'root' with grant option;
Query OK, 0 rows affected (0.00 sec)

mysql> select user,host from mysql.user;
+----------+-----------+
| user     | host      |
+----------+-----------+
| laojiang | %         |
| root     | %         |
| laojiang | 127.0.0.1 |
| laojiang | localhost |
| root     | localhost |
| laojiang | laojiang |
+----------+-----------+
6 rows in set (0.00 sec)

mysql>