mysql数据库安装、创建库和表,备份还原

时间:2022-11-03 08:29:17

 一、创建运行MySQL数据库的系统用户、组。

[root@beyond ~]# useradd -M -s /sbin/nologin mysql

解压并释放源代码:

[root@beyond mnt]# tar zxvf mysql-5.0.56.tar.gz -C /usr/src/

要是配置编译不了,就配置yum源

安装下面的软件;

[root@beyond mysql-5.0.56]# yum install *vim*

[root@beyond mysql-5.0.56]# yum install -y *termcap*

配置编译;

[root@beyond mysql-5.0.56]# ./configure --prefix=/usr/local/apache2 

Remember to check the platform specific part of the reference manual for

hints about installing MySQL on your platform. Also have a look at the

files in the Docs directory.

Thank you for choosing MySQL!

编译并安装; 

[root@beyond mysql-5.0.56]# make && make install 

2.建立配置文件;

[root@beyond mysql-5.0.56]# cp support-files/my-medium.cnf /etc/my.cnf

初始化数据库;

[root@beyond mysql-5.0.56]# /usr/local/mysql/bin/mysql_install_db --user=mysql

修改相关目录的所有权,以便mysql用户可以读写数据库。

[root@beyond mysql-5.0.56]# chown -R root.mysql /usr/local/mysql/

[root@beyond mysql-5.0.56]# chown -R mysql /usr/local/mysql/

调整lib库路径:

[root@beyond mysql-5.0.56]# echo "/usr/local/mysql/lib/mysql" >> /etc/ld.so.conf

刷新库文件搜索路径,使修改生效

[root@beyond mysql-5.0.56]# ldconfig 

MySQL启动控制;

[root@beyond mysql-5.0.56]# /usr/local/mysql/bin/mysqld_safe --user=mysql & 

[root@beyond mysql-5.0.56]# netstat -ntpl | grep 3306

tcp        0      0 0.0.0.0:3306                0.0.0.0:*                   LISTEN      23437/mysqld  

将mysqld添加为系统服务;

[root@beyond mysql-5.0.56]# cp support-files/mysql.server /etc/init.d/mysqld

[root@beyond mysql-5.0.56]# chmod +x /etc/init.d/mysqld 

[root@beyond mysql-5.0.56]# chkconfig --add mysqld

[root@beyond mysql-5.0.56]# chkconfig mysqld on

设置MySQL程序的执行路径;

[root@beyond mysql-5.0.56]# export PATH=$PATH:/usr/local/mysql/bin/

[root@beyond mysql-5.0.56]# echo "PATH=$PATH:/usr/local/mysql/bin" >> /etc/profile

数据库的基本管理,登录及退出MySQL环境

[root@beyond ~]# mysql -u root

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 1

Server version: 5.0.56-log Source distribution  退出;exit

 

mysql> 

设置root用户的mysql数据库密码;

[root@beyond ~]# mysqladmin -u root password "123.com" 

[root@beyond ~]# mysql -u root -p

Enter password: 

数据库结构,

//查询数据库的命令:

mysql> SHOW DATABASES;

+--------------------+

| Database           |

+--------------------+

| information_schema | 

| mysql              | 

| test               | 

+--------------------+

3 rows in set (0.00 sec)

 

查询数据库中的数据表;

mysql> USE mysql;

Database changed

mysql> SHOW TABLES;

+---------------------------+

| Tables_in_mysql           |

+---------------------------+

| columns_priv              | 

| db                        | 

| func                      | 

| help_category             | 

| help_keyword              | 

| help_relation             | 

| help_topic                | 

| host                      | 

| proc                      | 

| procs_priv                | 

| tables_priv               | 

| time_zone                 | 

| time_zone_leap_second     | 

| time_zone_name            | 

| time_zone_transition      | 

| time_zone_transition_type | 

| user                      | 

+---------------------------+

17 rows in set (0.00 sec)

数据库的创建和删除;

mysql> CREATE DATABASE beyond;

Query OK, 1 row affected (0.00 sec)

mysql> SHOW DATABASES;

+--------------------+

| Database           |

+--------------------+

| information_schema | 

| beyond             | 

| mysql              | 

| test               | 

+--------------------+

4 rows in set (0.00 sec)

删除数据库;

mysql> DROP DATABASE taotao;

Query OK, 0 rows affected (0.00 sec)

创建和删除数据表;

mysql> CREATE TABLE songs (songs_name CHAR(30) NOT NULL, songs_passwd CHAR(20) NOT NULL DEFAULT '123.com',PRIMARY KEY (songs_name));

Query OK, 0 rows affected (0.02 sec)

插入新的数据记录;

mysql> INSERT INTO auth.users(user_name,user_passwd) VALUES('huangjiajv',ENCRYPT('123456'));

Query OK, 1 row affected (0.01 sec)

mysql> INSERT INTO auth.users(user_name,user_passwd) VALUES('huangguanzhong',ENCRYPT('com.123'));

Query OK, 1 row affected (0.00 sec)

修改数据表信息;

mysql> UPDATE auth.users SET user_passwd=ENCRYPT('123.com') WHERE user_name='taotao';

Query OK, 0 rows affected (0.00 sec)

Rows matched: 0  Changed: 0  Warnings: 0

数据库的备份和恢复;

[root@www ~]# mysqldump -u root -p auth > mysql-auth.sql

Enter password: 

[root@www ~]# ll mysql-auth.sql 

-rw-r--r-- 1 root root 1863 Dec 30 01:01 mysql-auth.sql     //备份数据库; 

删除数据库auth;

mysql> USE mysql;

Database changed

mysql> DROP DATABASE auth;

Query OK, 1 row affected (0.01 sec)

查看一下是否删除;

mysql> SHOW DATABASES;

+--------------------+

| Database           |

+--------------------+

| information_schema | 

| beyond             | 

| mysql              | 

| test               | 

+--------------------+

4 rows in set (0.00 sec)

[root@www ~]# mysql -u root -p auth < mysql-auth.sql

Enter password: 

[root@www ~]# mysqldump -u root -p beyond > /usr/src/mysql-beyond.sql

Enter password: 

[root@www ~]# ll /usr/src/mysql-beyond.sql 

-rw-r--r-- 1 root root 1775 Dec 30 02:00 /usr/src/mysql-beyond.sql

[root@www ~]# mysql -u root -p beyond < /usr/src/mysql-beyond.sql

Enter password: 

[root@www ~]# 

备份某个数据库中的某个表;

[root@www ~]# mysqldump -u root -p mysql host user > mysql.host-user.sql

Enter password: 

[root@www ~]# 

 

刚装了mysql

sudo apt-get install mysql

安装成功了,安装最后要求输入了密码,也输入了,OK

mysql -uroot -p

输入设置的密码

竟然报错了!

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YSE)

问朋友,他说初始密码是空的,可我命名设置了密码的阿。

密码留空

还是错误!

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

于是重改密码!

#sudo /etc/init.d/mysql stop

# mysqld_safe --user=mysql --skip-grant-tables --skip-networking &

# mysql -u root mysql

mysql> UPDATE user SET Password=PASSWORD('newpassword') where USER='root';

mysql> FLUSH PRIVILEGES;

mysql> quit

# /etc/init.d/mysql restart

# mysql -u root -p

Enter password: 

mysql>

搞定!

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