MYSQL-5.7.19安装

下载安装包
```
#wget https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.19-linux-glibc2.12-x86_64.tar.gz
#tar -xzvf mysql-5.7.19-linux-glibc2.12-x86_64.tar.gz -C /usr/local
#cd /usr/local
#mkdir mysql
#mv ./mysql-5.7.19-linux-glibc2.12-x86_64/* ./mysql
#rm -rf mysql-5.7.19-linux-glibc2.12-x86_64
#groupadd mysql
#useradd -r -s /sbin/nologin -g mysql mysql
#mkdir mysql/data
#mkdir mysql/tmp
#mkdir mysql/log
#chown -R mysql mysql/
#chown -R mysql:mysql mysql/data
#cd mysql
#vim my.cnf
[mysqld]
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
port=3306
character-set-server=utf8
log-error=/usr/local/mysql/log/error.log
# 如果初始化未生成临时密码此使用此设置跳过登录需要输入密码
# skip-grant-tables
[client]

//保存退出
#apt-get install libaio-dev
//初始化
//注意执行后显示的临时密码
#./bin/mysqld --defaults-file=/usr/local/mysql/my.cnf --initialize --user=mysql

//建立密钥
#bin/mysql_ssl_rsa_setup --defaults-file=/usr/local/mysql/my.cnf

//如果未找到临时密码则
#./bin/mysql -uroot
#update mysql.user set authentication_string=password('123456') where user='root';
#flush privileges;
//注释掉my.cnf中的skip-grant-tables

//登陆mysql修改密码使用刚才的临时密码 
#./bin/mysql -uroot -p
//登录后修改密码
#SET PASSWORD = PASSWORD('123456');
#ALTER USER 'root'@'localhost' PASSWORD EXPIRE NEVER; 
#update mysql.user set Host='%' where Host='localhost';
#flush privileges;

//添加mysql到环境变量中去
#vim /etc/profile
//在文件后加上
export PATH=$PATH:/usr/local/mysql/bin

```



#apt-get install mysql-server

#mysql_secure_installation