linux下安装mysql5.7.17及简单配置

原文：http://www.th7.cn/db/mysql/201612/218745.shtml

1.mysql5.7.17安装在/usr/local/mysql目录里面，也可以安装在其他地方 （安装包最好与Linux系统一样，eg;32位的就是“mysql-5.7.17-linux-glibc2.5-i686.tar.gz”，官网可下载）

mkdir /usr/local/mysql

2.解压并复制

tar -xvf mysql-5.7.17-linux-glibc2.5-i686.tar.gz

mv mysql-5.7.17-linux-glibc2.5-i686.tar.gz/* /usr/local/mysql/

3.创建data目录（很重要！）

mkdir /usr/local/mysql/data

4.创建mysql用户和修改权限

groupadd mysql

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

5.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)

6. 复制配置文件到 /etc/my.cnf

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

7. 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 （vim /etc/my.cnf）

# 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

8.启动mysql

service mysqld start

ps -ef #查看是启动

9.查看初始化自动生成的密码： cat /root/.mysql_secret （记住并复制下来，等会登陆mysql需要）

10.进入mysql：bin/mysql -uroot -p （把刚刚复制的密码粘贴上来）

11.登录后重置root密码

mysql> SET PASSWORD FOR 'root'@localhost = PASSWORD（'123456'）；

Query OK, 0 rows affected, 1 warning (0.00 sec)