linux下安装mysql5.7

在linux（centos）下有2种方式安装，第一种使用rpm安装在网上可以搜到，第二种使用压缩包方式，我这里是采用压缩包方式。

1.这里我将mysql安装在/usr/local/mysql目录里面，也可以安装在其他地方

mkdir /usr/local/mysql

2.下载mysql压缩包

wget http://dev.MySQL.com/get/Downloads/MySQL-5.7/mysql-5.7.11-Linux-glibc2.5-x86_64.tar.gz

3.解压并复制

tar -xvf mysql-5.7.11-Linux-glibc2.5-x86_64.tar.gz
mv mysql-5.7.11-Linux-glibc2.5-x86_64/* /usr/local/mysql/

4.创建data目录

mkdir /usr/local/mysql/data

5.创建mysql用户和修改权限

groupadd mysql
chown -R mysql.mysql /usr/local/mysql/

6.初始化数据

[root@localhost mysql] ./bin/mysql_install_db --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data/
2016-01-20 02:47:35 [WARNING] mysql_install_db is deprecated. Please consider switching to mysqld --initialize
2016-01-20 02:47:45 [WARNING] The bootstrap log isn't empty:
2016-01-20 02:47:45 [WARNING] 2016-01-19T18:47:36.732678Z 0 [Warning] --bootstrap is deprecated. Please consider using --initialize instead
2016-01-19T18:47:36.750527Z 0 [Warning] Changed limits: max_open_files: 1024 (requested 5000)
2016-01-19T18:47:36.750560Z 0 [Warning] Changed limits: table_open_cache: 431 (requested 2000)

7. 复制配置文件到 /etc/my.cnf

cp -a ./support-files/my-default.cnf /etc/my.cnf (选择y)

8. mysql的服务脚本放到系统服务中

cp -a ./support-files/mysql.server /etc/init.d/mysqld
修改my.cnf文件
# These are commonly set, remove the # and set as required.
basedir = /usr/local/mysql
datadir = /usr/local/mysql/data
port = 3306
# server_id = .....
socket = /tmp/mysql.sock
character-set-server = utf8
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M 

9.启动mysql

service mysqld start 

10.修改mysql密码

[root@localhost mysql]# mysql -u root mysql
mysql>update user set authentication_string=PASSWORD('你的密码') where user='root';

10.创建快捷方式

ln -s /usr/local/mysql/bin/mysql /usr/bin

该实验亲测可是安装成功。在安装过程中可能会遇到问题，到网上查一下。