关于mysql系统配置怎么写的信息

mySQL装好需不需要在环境变量里配置 , 如何配置mySQL装好后配置环境变量mysql系统配置怎么写的步骤如下mysql系统配置怎么写:
mysql系统配置怎么写我们需要准备的材料分别是mysql系统配置怎么写:电脑、Mysql 。
1、首先mysql系统配置怎么写 , 查找到mysql安装目录 , 例如:D:\xampp\mysql 。
2、右键“我的电脑”,点击“高级系统设置”,点击“环境变量”按钮 。
3、点击“新建”按钮,变量名输入:MYSQL_HOME,变量值输入mysql的路径 , 例如:D:\xampp\mysql,点击“确定” 。
4、之后,打开cmd,即可直接输入数据库连接命令来使用 , 例如:mysql-uroot-p 。
怎么配置mysql数据库配置文件一、mysql_install_db说明
当MySQL的系统库(mysql系统库)发生故障或需要新加一个mysql实例时 , 需要初始化mysql数据库 。
需要使用的命令:/usr/local/mysql/bin/mysql_install_db
#/usr/local/mysql/bin/mysql_install_db --help 可以查看帮助信息如下
Usage: /usr/local/mysql/bin/mysql_install_db [OPTIONS]
--basedir=pathThe path to the MySQL installation directory.
--cross-bootstrapFor internal use.Used when building the MySQL system
tables on a different host than the target.
--datadir=pathThe path to the MySQL data directory.
--forceCauses mysql_install_db to run even if DNS does not
【关于mysql系统配置怎么写的信息】work.In that case, grant table entries that normally
use hostnames will use IP addresses.
--ldata=https://www.04ip.com/post/pathThe path to the MySQL data directory.
--rpmFor internal use.This option is used by RPM files
during the MySQL installation process.
--skip-name-resolveUse IP addresses rather than hostnames when creating
grant table entries.This option can be useful if
your DNS does not work.
--srcdir=pathFor internal use.The directory under which
mysql_install_db looks for support files such as the
error message file and the file for popoulating the
help tables.
--user=user_nameThe login username to use for running mysqld.Files
and directories created by mysqld will be owned by this
user.You must be root to use this option.By default
mysqld runs using your current login name and files and
directories that it creates will be owned by you.
All other options are passed to the mysqld program
除了支持以上的参数,还支持mysqld的参数 。
二、举例:
本文以新加一个mysql实例为例 。例如服务器上已经安装了3306端口的mysql服务,需要再启一个3308端口的mysql服务 。
假设mysql安装在/usr/local/mysql路径下,找一个磁盘空间剩余比较大的盘,如/data1,把3308端口的mysql的数据保存在/data1下
#mkdir /data1/mysql_3308
#mkdir /data1/mysql_3308/data
#chown -R mysql:mysql /data1/mysql_3308
复制一个mysql配置文件my.cnf到/data1/mysql_3308目录下
#vi /data1/mysql_3308/my.cnf
修改配置文件,将端口和相关目录的都改为新的设置 , 如下:
[client]
character-set-server = utf8
port= 3308
socket= /tmp/mysql_3308.sock
[mysqld]
user= mysql
port= 3308
socket= /tmp/mysql_3308.sock
basedir = /usr/local/mysql
datadir = /data1/mysql_3308/data
log-error = /data1/mysql_3308/mysql_error.log
pid-file = /data1/mysql_3308/mysql.pid
......其他略
确保配置文件无误 。
运行下面命令进行数据库的初始化:
#/usr/local/mysql/bin/mysql_install_db --defaults-file=/data1/mysql_3308/my.cnf --datadir=/data1/mysql_3308/data
完成后新的3308数据库就初始化好了,如果有报错,则按照报错的提示查看报错日志,一般情况下都是my.cnf配置文件的问题,修正后即可 。

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