MySQL5.7的安装&配置

下载安装包

# 下载安装包
$ wget https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.26-linux-glibc2.12-x86_64.tar.gz

解压安装

# 进入下载目录
$ tar -xzvf  mysql-5.7.26-linux-glibc2.12-x86_64.tar.gz -C /usr/local/
# 修改解压目录
$ mv mysql-5.7.26-linux-glibc2.12-x86_64/ mysql

mysql用户权限配置

# 创建用户和组
$ groupadd mysql
$ useradd -r -g mysql mysql

# 将安装目录所有者及所属组改为mysql
$ chown -R mysql.mysql /usr/local/mysql

# 创建data文件夹，用于存放数据库表之类的数据
# 进入mysql文件夹
$ mkdir data 

初始化

# 安装依赖包
$ yum install libaio

# 初始化
$ /usr/local/mysql/bin/mysqld --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data --initialize

配置my.cnf

$ /etc/my.cnf

# 内容如下
[mysqld]
datadir=/usr/local/mysql/data
basedir=/usr/local/mysql
socket=/tmp/mysql.sock
log-bin=mysql-bin
expire-logs-days=7
max-binlog-size=500M
user=mysql
port=3306
character-set-server=utf8
# 取消密码验证
skip-grant-tables
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# skip-grant-tables
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

MySQL服务化

# 将mysql加入到服务中
$ cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql

# 开机启动
$ chkconfig mysql on

# 启动|停止|重启mysql服务
$ service mysql start|stop|restart

登陆mysql

# 在配置文件/etc/my.cnf中跳过密码登陆，所以可以免密登陆
$  /usr/local/mysql/bin/mysql -uroot -p

# 配置环境变量 
$ vim /etc/profile
# 配置见截图

# 生效环境
$ source /etc/profile

# 登陆mysql
$ mysql -u root -p
# 见下截图