RedHat7.4安装mysql 5.7.21

1、 Windows环境下下载mysql安装包，选择RPM Bundle 下载，这是多个rpm文件的压缩包；

网址： https://dev.mysql.com/downloads/mysql/

2、 用xshell链接虚拟机的redhat7，然后再xshell中输入rz选择我们下载的安装包mysql-5.7.21-1.el7.x86_64.rpm-bundle.tar，导入的虚拟机中，并解压；

3、 root用户下，在目录/usr/local下创建mysql目录，然后将我们需要安装的文件复制到该目录；

[root@bogon mysql_rpm]# cp mysql-community-client-5.7.21-1.el7.x86_64.rpm /usr/local/mysql/
[root@bogon mysql_rpm]# cp mysql-community-common-5.7.21-1.el7.x86_64.rpm /usr/local/mysql
[root@bogon mysql_rpm]# cp mysql-community-libs-5.7.21-1.el7.x86_64.rpm /usr/local/mysql/
[root@bogon mysql_rpm]# cp mysql-community-server-5.7.21-1.el7.x86_64.rpm /usr/local/mysql/
[root@bogon mysql_rpm]# cp mysql-community-devel-5.7.21-1.el7.x86_64.rpm /usr/local/mysql
4、 按顺序对rpm文件进行安装

[root@bogon mysql]# rpm -ivh mysql-community-common-5.7.21-1.el7.x86_64.rpm
警告：mysql-community-common-5.7.21-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY
准备中... ################################# [100%]
正在升级/安装...
1:mysql-community-common-5.7.21-1.e################################# [100%]
[root@bogon mysql]# rpm -ivh mysql-community-libs-5.7.21-1.el7.x86_64.rpm
警告：mysql-community-libs-5.7.21-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY
准备中... ################################# [100%]
正在升级/安装...
1:mysql-community-libs-5.7.21-1.el7################################# [100%]
[root@bogon mysql]# rpm -ivh mysql-community-client-5.7.21-1.el7.x86_64.rpm
警告：mysql-community-client-5.7.21-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY
准备中... ################################# [100%]
正在升级/安装...
1:mysql-community-client-5.7.21-1.e################################# [100%]
[root@bogon mysql]# rpm -ivh mysql-community-server-5.7.21-1.el7.x86_64.rpm
警告：mysql-community-server-5.7.21-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY
准备中... ################################# [100%]
正在升级/安装...
1:mysql-community-server-5.7.21-1.e################################# [100%]
[root@bogon mysql]# rpm -ivh mysql-community-devel-5.7.21-1.el7.x86_64.rpm
警告：mysql-community-devel-5.7.21-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY
准备中... ################################# [100%]
正在升级/安装...
1:mysql-community-devel-5.7.21-1.el################################# [100%]

5、 打开mysql的服务

[root@bogon mysql]# service mysqld start
Redirecting to /bin/systemctl start mysqld.service

6、 查看MySQL服务状态

[root@bogon mysql]# service mysqld status
Redirecting to /bin/systemctl status mysqld.service
● mysqld.service - MySQL Server
Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
Active: active (running) since 六 2018-01-27 20:45:49 PST; 18s ago
Docs: man:mysqld(8)
http://dev.mysql.com/doc/refman/en/using-systemd.html
Process: 50557 ExecStart=/usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid $MYSQLD_OPTS (code=exited, status=0/SUCCESS)
Process: 50473 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS)
Main PID: 50559 (mysqld)
CGroup: /system.slice/mysqld.service
└─50559 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid

1月 27 20:45:34 bogon systemd[1]: Starting MySQL Server...
1月 27 20:45:49 bogon systemd[1]: Started MySQL Server.

7、 MySQL安装成功后，会生成一个临时密码，我们第一次登陆需要输入这个密码，所以查看该临时密码，如下，cbZUwQ&Ry3Ut即为临时密码；

[root@bogon mysql_rpm]# grep password /var/log/mysqld.log
2018-01-28T04:45:43.117298Z 1 [Note] A temporary password is generated for root@localhost: cbZUwQ&Ry3Ut

8、 登陆MySQL，登录代码 mysql -u root -p  回车就让你输入密码，输入密码的时候，粘贴上面的cbZUwQ&Ry3Ut即可；

9、修改密码

mysql> set password for 'root'@'localhost'='Aoeiuv_123'；
Query OK, 0 rows affected (0.00 sec)

10、授权用户momo登陆

mysql> grant all privileges on *.* to momo@'%' identified by 'Aoeiuv_123';
Query OK, 0 rows affected, 1 warning (0.01 sec)

11、momo用户登陆MySQL

[momo@bogon mysql_rpm]$ mysql -u momo -p
Enter password: 
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 10
Server version: 5.7.21 MySQL Community Server (GPL)

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