Mysql 数据库基本操作
1.数据库设置密码
[root@db02 scripts]# mysqladmin -uroot password 123
2.使用密码登录
#1.正确的方式(不规范)
[root@db02 scripts]# mysql -uroot -p123
[root@db02 scripts]# mysql -u root -p123
#2.错误的方式
[root@db02 scripts]# mysql -uroot -p 123
#官网上说-p或者--password参数与密码之间不能有间隔或多于字符
#3.正确且规范的方式
[root@db02 scripts]# mysql -u root -p
Enter password:
3.查询用户
mysql> select user,host from mysql.user;
+------+-----------+
| user | host |
+------+-----------+
| root | 127.0.0.1 |
| root | ::1 |
| | db02 |
| root | db02 |
| | localhost |
| root | localhost |
+------+-----------+
6 rows in set (0.00 sec)
4.删除用户(优化)
删除无关的用户,安全基线中的一项。
mysql> drop user root@'::1';
Query OK, 0 rows affected (0.00 sec)
mysql> select user,host from user;
+------+-----------+
| user | host |
+------+-----------+
| root | 127.0.0.1 |
| | db02 |
| root | db02 |
| | localhost |
| root | localhost |
+------+-----------+
5 rows in set (0.00 sec)