安装篇——Linux下安装mysql

..1.下载linux的mysql安装包
https://cdn.mysql.com//Downloads/MySQL-5.6/mysql-5.6.43-linux-glibc2.12-
x86_64.tar.gz
..2.上传到linux /usr/local/ 解压，重命名

cd /usr/local
rz
tar -zxvf mysql-5.6.43-linux-glibc2.12-x86_64.tar.gz
mv mysql-5.6.43-linux-glibc2.12-x86_64.tar.gz mysql

..3.创建数据文件夹

mkdir mysql/data/mysql

..4.添加用户组，添加用户

groupadd mysql
useradd -r -g mysql mysql

ps：添加mysql这个用户组，并将mysql这个用户添加到mysql用户组中
..5.进入mysql目录，设置权限

cd mysql
chown -R mysql:mysql ./
chown -R mysql:mysql data
chown -R root:root ./

..6.安装数据库

./scripts/mysql_install_db --user=mysql --datadir=/usr/local/mysql/data/mysql

..6.设置my.cnf文件，如果/usr/local/mysql/support-files/目录下有my-default.cnf

cp support-files/my-default.cnf /etc/my.cnf

如果没有则创建一个my.cnf文件

touch /etc/my.cnf
vim /etc/my.cnf

.1{
[mysqld]
character_set_server=utf8
init_connect='SET NAMES utf8'
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
socket=/tmp/mysql.sock
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
}

chown mysql:mysql /var/run/mysqld
chmod 750 /var/run/mysqld

ps：向my.cnf文件中添加上面.1大括号中的内容
..7.设置开机服务

cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld

..8.启动服务
service mysqld start
..9.进入到mysql目录，连接mysql
cd /usr/local/mysql/bin
mysql -uroot -p
..10.设置新的密码
GRANT USAGE ON *.* TO 'username'@'localhost' IDENTIFIED BY 'password' WITH GRANT
OPTION;
ps：username为当前用户，password为新设置的密码
..11.设置允许远程访问
GRANT ALL PRIVILEGES ON *.* TO 'username'@'%' IDENTIFIED BY 'password' WITH
GRANT OPTION;
ps：该命令为允许所有电脑访问