本实例要求下载并安装调试Mysql数据库。 第一步：下载Mysql数据库安装所需的全部软件。
我已提前下载好数据库软件，直接在服务器下载即可，如下：
通过scp直接下载：
[[email protected] ~]# scp [email protected]:/root/mysql* /root/
软件如下图：
[[email protected] ~]# ls mysql-*
mysql-5.7.17.tar
mysql-community-client-5.7.17-1.el7.x86_64.rpm
mysql-community-common-5.7.17-1.el7.x86_64.rpm
mysql-community-devel-5.7.17-1.el7.x86_64.rpm
mysql-community-embedded-5.7.17-1.el7.x86_64.rpm
mysql-community-embedded-compat-5.7.17-1.el7.x86_64.rpm
mysql-community-embedded-devel-5.7.17-1.el7.x86_64.rpm
mysql-community-libs-5.7.17-1.el7.x86_64.rpm
mysql-community-libs-compat-5.7.17-1.el7.x86_64.rpm
mysql-community-minimal-debuginfo-5.7.17-1.el7.x86_64.rpm
mysql-community-server-5.7.17-1.el7.x86_64.rpm
mysql-community-test-5.7.17-1.el7.x86_64.rpm
第二步：通过yum进行安装，起服务器并查看[[email protected] ~]# yum -y install mysql-*.rpm
[[email protected] ~]# systemctl restart mysqld
[[email protected] ~]# systemctl enable mysqld
[[email protected] ~]# systemctl status mysqld.service
u25cf mysqld.service - MySQL Server
Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
Active: active (running) since u4e8c 2019-10-15 11:29:11 CST; 1min 15s ago
Docs: man:mysqld(8)
http://dev.mysql.com/doc/refman/en/using-systemd.html
Main PID: 31584 (mysqld)
CGroup: /system.slice/mysqld.service
u2514u250031584 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid...
10u6708 15 11:28:42 agt20.tedu.cn systemd[1]: Starting MySQL Server...
10u6708 15 11:29:11 agt20.tedu.cn systemd[1]: Started MySQL Server.
[[email protected] ~]#
第三步：连接MySQL服务器，修改密码；1）查看初始密码
[[email protected] ~]# grep -i ‘password‘ /var/log/mysqld.log
2019-10-15T03:28:55.200931Z 1 [Note] A temporary password is generated for [email protected]calhost: r3qhDysMrM)
2）使用初始密码连接mysql服务
[[email protected] ~]# mysql -uroot -p‘r3qhDysMrM)‘
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 4
Server version: 5.7.17
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.
mysql>
3）重置数据库管理员roo本机登录密码
mysql> alter user [email protected] identified by ‘[email protected]‘;
Query OK, 0 rows affected (0.00 sec)
4）修改密码策略
mysql> set global validate_password_policy=0;
Query OK, 0 rows affected (0.01 sec)
mysql> set global validate_password_length=6;
Query OK, 0 rows affected (0.00 sec)
mysql> alter user [email protected] identified by ‘[email protected]‘;
Query OK, 0 rows affected (0.00 sec)
5）使用修改后的密码登录
[[email protected] ~]# mysql -uroot [email protected]
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 5
Server version: 5.7.17 MySQL Community Server (GPL)
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.
mysql>
至此Mysql数据库安装调试完成！！！！
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