mkdir -p /opt/mysql 

[root@zw-test-db mysql]# cd /tools/ 
[root@zw-test-db tools]# ll -l mysql-5.7.14-linux-glibc2.5-x86_64.tar.gz 
-rw-r--r-- 1 root root 642694570 Aug 29 15:02 mysql-5.7.14-linux-glibc2.5-x86_64.tar.gz 

[root@zw-test-db tools]# cd /opt/mysql/ 
[root@zw-test-db mysql]# tar -zxvf /tools/mysql-5.7.14-linux-glibc2.5-x86_64.tar.gz 


[root@zw-test-db mysql]# mv mysql-5.7.14-linux-glibc2.5-x86_64/ mysql-5.7.14 
[root@zw-test-db mysql]# ll 
drwxr-xr-x 9 7161 31415 4096 Jul 12 21:03 mysql-5.7.14 

[root@zw-test-db mysql]# cd /usr/local/ 
[root@zw-test-db local]# ls 
bin etc games include lib lib64 libexec redis-3.2.2 sbin share src 
[root@zw-test-db local]# ln -s /opt/mysql/mysql-5.7.14 /usr/local/mysql 


[root@zw-test-db local]# ll mysql 
lrwxrwxrwx 1 root root 23 Aug 31 17:36 mysql -> /opt/mysql/mysql-5.7.14 
[root@zw-test-db local]# 

[root@zw-test-db /]# groupadd mysql 
[root@zw-test-db /]# useradd -M -g mysql -s /sbin/nologin -d /usr/local/mysql mysql 

mkdir /data/mysql 
mkdir /data/mysql/mysql_3306 
cd /data/mysql/mysql_3306/ 
mkdir data 
mkdir logs 
mkdir tmp 
chown -R mysql:mysql /data/mysql/mysql3306 

[root@zw-test-db mysql]# cd /usr/local/mysql/ 
[root@zw-test-db mysql]# ./bin/mysqld --initialize 


[root@zw-test-db data]# pwd 
/data/mysql/mysql_3306/data 

### 下面是5.5， 5.6 初始化 
/usr/local/mysql/scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql 

cd /data/mysql/mysql_3306/data 

[root@zw-test-db data]# vim error.log 
[root@zw-test-db data]# tail -f error.log 
2016-08-31T09:44:32.394657Z 0 [Note] Giving 0 client threads a chance to die gracefully 
2016-08-31T09:44:32.394680Z 0 [Note] Shutting down slave threads 
2016-08-31T09:44:32.394686Z 0 [Note] Forcefully disconnecting 0 remaining clients 
2016-08-31T09:44:32.415409Z 0 [Note] Binlog end 
2016-08-31T09:44:32.434217Z 0 [Note] InnoDB: FTS optimize thread exiting.
2016-08-31T09:44:32.434293Z 0 [Note] InnoDB: Starting shutdown... 
2016-08-31T09:44:32.534587Z 0 [Note] InnoDB: Dumping buffer pool(s) to /data/mysql/mysql_3306/data/ib_buffer_pool 
2016-08-31T09:44:32.534741Z 0 [Note] InnoDB: Buffer pool(s) dump completed at 160831 17:44:32 
2016-08-31T09:44:34.308784Z 0 [Note] InnoDB: Shutdown completed; log sequence number 2525428 
2016-08-31T09:44:34.308945Z 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1" 

root@zw-test-db bin]# ./mysqld_safe --user=mysql &
[1] 12455 
[root@zw-test-db bin]# 160830 15:18:01 mysqld_safe Logging to '/usr/local/mysql/data/zw-test-db.err'. 
160830 15:18:01 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data 

[root@zw-test-db bin]# /etc/init.d/mysqld restart
Shutting down MySQL..160830 15:18:14 mysqld_safe mysqld from pid file /usr/local/mysql/data/zw-test-db.pid ended
        [ OK ]
 
Starting MySQL.      [ OK ] 
[1]+ Done   ./mysqld_safe --user=mysql 

[root@zw-test-db bin]# service mysqld restart 
Shutting down MySQL..     [ OK ]
Starting MySQL.      [ OK ] 
[root@zw-test-db bin]# 

[root@zw-test-db mysql]# mysql -u root -p 
Enter password: 
Welcome to the MySQL monitor. Commands end with ; or \g. 
Your MySQL connection id is 3 
Server version: 5.7.14-log 


Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved. 


Oracle is a registered trademark of Oracle Corporation and/or its 
affiliates. Other names may be trademarks of their respective 
owners. 

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. 

root@localhost [(none)]>show databases; --提示要修改密码 
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement. 

root@localhost [(none)]>alter user user() identified by '123456'; 
Query OK, 0 rows affected (0.00 sec) 

mysql> flush privileges; 
Query OK, 0 rows affected (0.00 sec) 

root@localhost [(none)]>show databases;
+--------------------+ 
| Database  | 
+--------------------+ 
| information_schema | 
| mysql  | 
| performance_schema | 
| sys  | 
+--------------------+ 
4 rows in set (0.00 sec) 

delete from mysql.user where user!='root' or host!='localhost'; --删除非root用户，登陆主机不是localhost的账号 
flush privileges; 
alter user user() identified by '123456'; 
drop database test; 
truncate mysql.db;