[root@master /opt/bigdata/service]# rpm -ivh mysql-community-common-5.7.22-1.el7.x86_64.rpm 
Preparing...                          ################################# [100%]
Updating / installing...
   1:mysql-community-common-5.7.22-1.e################################# [100%]

[root@master /opt/bigdata/service]# rpm -ivh mysql-community-libs-5.7.22-1.el7.x86_64.rpm 
 

Preparing...                          ################################# [100%]
Updating / installing...
   1:mysql-community-libs-5.7.22-1.el7################################# [100%]
[root@master /opt/bigdata/service]# rpm -ivh mysql-community-client-5.7.22-1.el7.x86_64.rpm 
Preparing...                          ######
 
########################### [100%]
Updating / installing...
   1:mysql-community-client-5.7.22-1.e################################# [100%]
[root@master /opt/bigdata/service]# rpm -ivh mysql-community-server-
mysql-community-server-5.7.22-1.el7.x86_64.rpm          mysql-community-server-minimal-5.7.22-1.el7.x86_64.rpm  
[root@master
 
 /opt/bigdata/service]# rpm -ivh mysql-community-server-5.7.22-1.el7.x86_64.rpm 
Preparing...                          ################################# [100%]
Updating / installing...
   1:mysql-community-server-5.7.22-1.e################################# [100%]

3, 初始化密碼：

[root@master /opt/bigdata/service]# mysqld --initialize --user=mysql
[root@master /opt/bigdata/service]# cat cat /var/log/mysqld.log | grep password
cat: cat: No such file or directory
2018-05-28T13:03:28.527740Z 1 [Note] A temporary password is generated for root@localhost: 0wEeI2ylfm?.

4, 啟動mysql修改密碼：

systemctl start mysqld.service

[root@master /opt/ClusterBuildScripts]# mysql -u root -p
Enter password: （輸入3中得到的初始化密碼：）
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.22

Copyright (c) 2000, 2018, 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.

mysql> set password = password('12345678');
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> grant all privileges on *.* to 'root' @'%' identified by  'yourpassword';
Query OK, 0 rows affected, 1 warning (0.00 sec)

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

mysql> exit
Bye

5, mysql 啟動和停止相關命令

centos  預設啟動方式：
systemctl start mysqld.service

啟動：

使用 service 啟動：service mysqld start
使用 mysqld 指令碼啟動：/etc/inint.d/mysqld start
使用 safe_mysqld 啟動：safe_mysqld&
停止：

使用 service 啟動：service mysqld stop
使用 mysqld 指令碼啟動：/etc/inint.d/mysqld stop
mysqladmin shutdown 
重啟：

使用 service 啟動：service mysqld restart
使用 mysqld 指令碼啟動：/etc/inint.d/mysqld restart

6, mysql 自啟動：

[root@master /]# systemctl list-unit-files | grep mysql 
mysqld.service                                enabled 
mysqld@.service                               disabled
[root@master /]# 

centos 預設自啟動
可以進行取消：
systemctl disable mysqld

然後在/etc/rc.local
先執行systemctl start mysqld