centos7 下安装mysql 服务详解（附带每一步命令行截图，超详细~~~）

centos7 下安装mysql 服务详解

安装mysql

1. 下载安装mysql 源

[root@miao ~]# wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
--2018-12-11 21:25:08--  http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
Resolving repo.mysql.com (repo.mysql.com)... 2.17.212.38
Connecting to repo.mysql.com (repo.mysql.com)|2.17.212.38|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 6140 (6.0K) [application/x-redhat-package-manager]
Saving to: ‘mysql-community-release-el7-5.noarch.rpm’

100%[=============================================================================================================================>] 6,140       2.18KB/s   in 2.8s

2018-12-11 21:25:13 (2.18 KB/s) - ‘mysql-community-release-el7-5.noarch.rpm’ saved [6140/6140]

[root@miao ~]# rpm -ivh mysql-community-release-el7-5.noarch.rpm
Preparing...                          ################################# [100%]
Updating / installing...
   1:mysql-community-release-el7-5    ################################# [100%]

2. 安装mysql

[root@miao ~]# yum install -y mysql-community-server
Loaded plugins: fastestmirror
base                                                                                                                                            | 3.6 kB  00:00:00
epel                                                                                                                                            | 3.2 kB  00:00:00
extras                                                                                                                                          | 3.4 kB  00:00:00
mysql-connectors-community                                                                                                                      | 2.5 kB  00:00:00
mysql-tools-community                                                                                                                           | 2.5 kB  00:00:00
mysql56-community                                                                                                                               | 2.5 kB  00:00:00
updates                                                                                                                                         | 3.4 kB  00:00:00
(1/9): base/7/x86_64/group_gz                                                                                                                   | 166 kB  00:00:00
(2/9): extras/7/x86_64/primary_db                                                                                                               | 154 kB  00:00:00
(3/9): epel/x86_64/primary   
......
......
......
Installed:
  mysql-community-libs.x86_64 0:5.6.42-2.el7                                        mysql-community-server.x86_64 0:5.6.42-2.el7

Dependency Installed:
  libaio.x86_64 0:0.3.109-13.el7                         mysql-community-client.x86_64 0:5.6.42-2.el7           mysql-community-common.x86_64 0:5.6.42-2.el7
  perl-Compress-Raw-Bzip2.x86_64 0:2.061-3.el7           perl-Compress-Raw-Zlib.x86_64 1:2.061-4.el7            perl-DBI.x86_64 0:1.627-4.el7
  perl-Data-Dumper.x86_64 0:2.145-3.el7                  perl-IO-Compress.noarch 0:2.061-2.el7                  perl-Net-Daemon.noarch 0:0.48-5.el7
  perl-PlRPC.noarch 0:0.2020-14.el7

Replaced:
  mariadb-libs.x86_64 1:5.5.52-1.el7

Complete!

启动，停止or 重启mysql

启动：systemctl start mysqld

停止：systemctl stop mysqld

重启：systemctl restart mysqld

修改初始化密码

1. 进入mysql shell:（默认密码为空）

[root@miao ~]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.6.42 MySQL Community Server (GPL)

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>

注意：

我这个版本mysql 默认密码为空，有的版本则是系统生成随机密码，查看随机密码方法如下：

查看系统随机默认密码：(使用随机密码登录之后，系统随后会强制要求修改)

grep ‘temporary password’ /var/log/mysqld.log

2. 修改密码

mysql> use mysql;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> update user set password=password('newPass123') where user='root' and host='localhost';
Query OK, 1 row affected (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 0

添加远程连接用户

mysql> grant all privileges on *.* to 'user01'@'%' identified by 'newPass123';
Query OK, 0 rows affected (0.00 sec)

这句命令的意思：grant 表示授权，all privileges 表示所有权限，on . 表示所有库的所有表（当然可以指定某些库的某些表），to ‘user01’@’%’ 表示授权给用户名为user01,ip无限制的用户，by ‘newPass123’ 表示user01 的密码。

之后服务器关闭浏览器或者开启3306端口后，就可以远程连接此mysql服务。