Yum installs MySQL and related directory paths and modifies directories

Sometimes, for convenience, some students like to install MySQL through Yum, without setting up a unified file directory and software catalog, then it will bring a lot of trouble for the subsequent maintenance work! Here's a quick introduction to the Yum installation of MySQL and the associated directory path under this type of installation, and finally a quick introduction to how to change the file directory! Yum installs MySQL1, installs client and server side

#确认mysql是否已安装：    yum list installed mysql*rpm -qa | grep mysql*#查看是否有安装包：yum list mysql*#安装mysql客户端：yum install mysql#安装mysql 服务器端：yum install mysql-serveryum install mysql-devel

2. Start and stop settings

#数据库字符集设置#mysql配置文件/etc/my.cnf中加入default-character-set=utf8#启动mysql服务：service mysqld start#或者/etc/init.d/mysqld start#设置开机启动：chkconfig --add mysqld#查看开机启动设置是否成功chkconfig --list | grep mysql*mysqld 0:关闭 1:关闭 2:启用 3:启用 4:启用 5:启用 6:关闭#停止mysql服务：service mysqld stop

3, login and forget to change the password

#创建root管理员：#mysqladmin -u root password 666666#登录：mysql -u root -p#如果忘记密码，则执行以下代码来修改密码service mysqld stopmysqld_safe --user=root --skip-grant-tablesmysql -u rootuse mysqlupdate user set password=password("666666") where user="root";flush privileges;

4. Remote Access settings

#开放防火墙的端口号#mysql增加权限：#mysql库中的user表新增一条记录host为“%”，user为“root”。use mysql;UPDATE user SET Host = '%' WHERE User = 'root' LIMIT 1;#%表示允许所有的ip访问

5. Several important directories of MySQL

#(a)数据库目录/var/lib/mysql/#(b)配置文件/usr/share /mysql（mysql.server命令及配置文件）#(c)相关命令/usr/bin（mysqladmin mysqldump等命令）#(d)启动脚本/etc/rc.d/init.d/（启动脚本文件mysql的目录）

CENTOS6 Modify the yum installed MySQL default directory 1. Create a new directory

#数据目录设置为 /home/datamkdir -p /home/data

2. Stop the MySQL service process:

mysqladmin -u root -p shutdown

　　

3. Move/var/lib/mysql Entire directory to/home/data

　　mv /var/lib/mysql　/home/data/
　　

4. Modify the configuration file my.cnf

#假如/etc/目录下没有my.cnf配置文档，请到/usr/share/mysql/下找到*.cnf文档#拷贝其中一个到/etc/并改名为my.cnf)中。命令如下：cp /usr/share/mysql/my.cnf　/etc/my.cnfvi　 my.cnf　　 [mysqld]port　　　= 3306socket　 = /home/data/mysql/mysql.sock　　　#修改socket参数

5. Modify the MySQL startup script/etc/init.d/mysql

vi　/etc/init.d/mysqldatadir=/home/data/mysql　　 #修改datadir数据目录的位置#做一个mysql.sock 链接：ln -s /home/data/mysql/mysql.sock /var/lib/mysql/mysql.sock

6. Check the owner and permission of the relevant directory.

7. Restart the MySQL service

/etc/init.d/mysql　start

Yum installs MySQL and related directory paths and modifies directories