安装Mysql5.7

将mysql-5.7.16-linux-glibc2.5-x86_64.tar.gz 拷贝到/soft下

1. 创建组和不可登录用户
   groupadd mysql
useradd -r -g mysql -s /bin/false mysql

2. 依赖安装 （可能需要）
   yum -y install libaio libaio-devel

3. 解压安装
   tar -zxvf mysql-5.7.16-linux-glibc2.5-x86_64.tar.gz
mv mysql-5.7.16-linux-glibc2.5-x86_64 /usr/local/mysql
chown -R mysql:mysql /usr/local/mysql
mkdir /usr/local/mysql/data
chown -R root /usr/local/mysql
chown -R mysql /usr/local/mysql/data

4. 修改配置文件
   cp /usr/local/mysql/support-files/my-default.cnf /etc/my.cnf
vim /etc/my.cnf

[mysql]
default-character-set=utf8

[mysqld]
character_set_server=utf8

basedir = /usr/local/mysql/
datadir = /usr/local/mysql/data
socket = /tmp/mysql.sock

8. 修改环境变量
   vi /etc/profile

MYSQL_HOME=/usr/local/mysql
PATH=$MYSQL_HOME/bin:$PATH
export MYSQL_HOME PATH

source /etc/profile

6. 初始化数据库
   cd /usr/local/mysql
   这里会有一个随机密码，请记牢
   mysqld --defaults-file=/etc/my.cnf --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data

7. 制作启动文件
   cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql
chkconfig --add mysql
chkconfig mysql on
vi /etc/init.d/mysql

basedir=/usr/local/mysql
datadir=/usr/local/mysql/data

7. 启动停止服务
   service mysql start
mysql -uroot -p
   进入后必须更改密码，否则不允许操作
   SET PASSWORD = PASSWORD('newpasswd');
service mysql stop