平台:红帽RHEL5 + VSFTPD + MySQL一、安装MySQLmysql-5.1.7-beta-linux-i686-glibc23.tar.gz# tar zxvf mysql-5.1.7-beta-linux
平台:红帽RHEL5 + VSFTPD + MySQL
一、安装MySQL
mysql-5.1.7-beta-linux-i686-glibc23.tar.gz
# tar zxvf mysql-5.1.7-beta-linux-i686-glibc23.tar.gz
# ln -s mysql-5.1.7-beta-linux-i686-glibc23 /usr/local/mysql
# cd /usr/local/mysql
# scripts/mysql_install_db --user=mysql
# chown -R root .
# chown -R mysql data
# chgrp -R mysql .
# bin/mysqld_safe &
# bin/mysql
mysql >
二、安装 pam_mysql.so
pam_mysql-0.7RC1.tar.gz //下载地址:chinaunix
# tar zxvf pam_mysql-0.7RC1.tar.gz
# cd pam_mysql-0.7RC1
# ./configure --with-mysql=/usr/local/mysql
# make clean install
# cp /usr/lib/security/pam_mysql.so /lib/security/
三、安装 vsftpd
通过rpm安装EL5自带的vsftpd rpm 包就可以。
四、建立虚拟用户
# useradd -d /home/vftp -s /bin/nologin vftp -m
五、建立认证
利用mysql建立用户
就是把用户名和密码放在mysql库里,实现起来也相当简单
(1)建立一个库并设置相应权限
# mysql –p
mysql>create database ftpd;
mysql>use ftpd;
mysql>create table user(name char(20) binary,passwd char(20) binary);
mysql>insert into user (name,passwd) values ('mike','123');
mysql>insert into user (name,passwd) values ('tom','123');
mysql>grant select,,insert on ftpd.user to vftp@localhost identified by '123';
mysql>flush privileges; 刷新权限设置
mysql>quit
(2)建立PAM认证信息
# vi /etc/pam.d/vftp ,内容如下
auth required /lib/security/pam_mysql.so user=vftp passwd=123 host=localhost db=ftpd table=user usercolumn=name passwdcolumn=passwd crypt=0
account required /lib/security/pam_mysql.so user=vftp passwd=123 host=localhost db=ftpd table=user usercolumn=name passwdcolumn=passwd crypt=0
注意:
crypt= n
crypt=0: 明文密码
crypt=1: 使用crpyt()函数(对应SQL数据里的encrypt(),encrypt()随机产生salt)
crypt=2: 使用MYSQL中的password()函数加密
crypt=3:表示使用md5的散列方式
六、修改ftp配置文件
vi /etc/vsftpd/vsftpd.conf
pam_service_name=vftp
guest_enable=YES
guest_username=vftp
七、验证
以mike 和 tom的身份登陆ftp

MySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.

MySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.

MySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.

SQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA

The main role of MySQL in web applications is to store and manage data. 1.MySQL efficiently processes user information, product catalogs, transaction records and other data. 2. Through SQL query, developers can extract information from the database to generate dynamic content. 3.MySQL works based on the client-server model to ensure acceptable query speed.

The steps to build a MySQL database include: 1. Create a database and table, 2. Insert data, and 3. Conduct queries. First, use the CREATEDATABASE and CREATETABLE statements to create the database and table, then use the INSERTINTO statement to insert the data, and finally use the SELECT statement to query the data.

MySQL is suitable for beginners because it is easy to use and powerful. 1.MySQL is a relational database, and uses SQL for CRUD operations. 2. It is simple to install and requires the root user password to be configured. 3. Use INSERT, UPDATE, DELETE, and SELECT to perform data operations. 4. ORDERBY, WHERE and JOIN can be used for complex queries. 5. Debugging requires checking the syntax and use EXPLAIN to analyze the query. 6. Optimization suggestions include using indexes, choosing the right data type and good programming habits.


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