安装mysql步骤及报错ERROR 1045 (28000)

1.centos 系统中使用yum工具安装 mysql.

 

[root@localhost ~]#yum install -y mysql

 

2.yum install -y mysql后，启动mysql报错如下：

 

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

解决办法：缺少组件，安装mysql-server包。

 

3.安装组件mysql-server

 

[root@localhost ~]#yum install -y mysql-server

 

4.启动mysql

 

 [root@localhost ~]#service mysqld start

 

5.使用mysql报错

 

[root@localhost ~]# mysql

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

  

6.报错解决办法

 

（1）service mysqld stop

 

（2）/usr/bin/mysqld_safe --skip-grant-tables

（3）另外开个SSH连接
        [root@localhost ~]# mysql
        mysql> GRANT ALL PRIVILEGES ON *.* TO root@"%" IDENTIFIED BY "root";
        mysql>use mysql
        mysql>update user set password=password("123456") where user="root";
        mysql>flush privileges;
        mysql>exit

 

     如果有报错如下：

mysql> GRANT ALL PRIVILEGES ON *.* TO root@"%" IDENTIFIED BY "root";
ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement

 

解决办法：先输入flush privileges; 再执行 GRANT ALL PRIVILEGES ON *.* TO root@"%" IDENTIFIED BY "root";其他步骤不要忘记。

 

（4）[root@localhost ~]#pkill -KILL -t pts/0 可将pts为0的**用户(之前运行mysqld_safe的用户  窗口)强制踢出
（5）正常启动 mysql：service mysqld start

如果没启动mysqld服务就使用mysql,会报错:

[root@localhost ~]# mysql -u root -p
Enter password: 
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111)

 

7.成功进入mysql

 

[root@localhost ~]# mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.1.73 Source distribution

Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show databases;
+----------------------+
| Database             |
+----------------------+
| information_schema   |
| dbname               |
| mysql                |
| test                 |
+----------------------+
4 rows in set (0.00 sec)

mysql>