CentOS7 安装MySQL

这段时间在安装mysql时候遇到点问题，原先的yum安装安装不上，于是自己采用rpm安装mysql；

mysql需要的rpm包下载地址：http://repo.mysql.com/yum/

选择你自己想要安装的版本，打开之后会是这样的。

 

1. 首先清除centos7系统中默认的数据库mariadb，否则不能安装mysql。

rpm -qa |grep mariadb |xargs yum remove -y

2.下载mysql的相关rpm包

　

  关于下载问题，你可以直接使用wget + 包的URL 下载到一个临时文件（我的是/tmp/download文件）

 

 

   注意：每个安装包版本号是一样的，否则后面安装会出现问题；意味着每个文件都是以5.7.19-1.el7.x86_64.rpm结尾的

3.切换到下载包目录下（cd 你的下载目录），然后对每个包进行一次安装；

  rpm -ivh mysql-community-common-5.7.19-1.el7.x86_64.rpm 
  rpm -ivh mysql-community-libs-5.7.19-1.el7.x86_64.rpm 
  rpm -ivh mysql-community-libs-compat-5.7.19-1.el7.x86_64.rpm 
  rpm -ivh mysql-community-client-5.7.19-1.el7.x86_64.rpm 
  rpm -ivh mysql-community-server-5.7.19-1.el7.x86_64.rpm

　在安装最后一个mysql-community-server的时候可能会出现下面的错误提示：

 

  解决这个问题是因为系统缺少了libaio这个库，我们安装好就可以了。

下载地址：http://mirror.centos.org/centos/6/os/x86_64/Packages/libaio-0.3.107-10.el6.x86_64.rpm

这时候就可以安装mysql-community-server;

 

4.查看安装mysql时候生成的临时密码，这个临时密码放在了mysql日志文件中了。（对于Mysql 5.7.6以后的5.7系列版本，Mysql使用mysqld --initialize或mysqld --initialize-insecure命令来初始化数据库，后者可以不生成临时密码。）

[root@localhost ~]# cat /etc/my.cnf  

 log-error=/var/log/mysqld.log  --找到日志路径  

[root@localhost  ~]# cat /var/log/mysqld.log | grep password  --查到密码为PCbu?SNEx8zl  

 

[root@localhost  ~]# /usr/bin/mysql_secure_installation --安装完mysql后执行自带的安全设置  

    

 Securing the MySQL server deployment.  

　　Enter password for user root:   --输入刚找到的临时密码

 　　The existing password for the user account root has expired. Please set a new password.  

　　New password:     --设置新的密码

　　Re-enter new password:   

　　The 'validate_password' plugin is installed on the server.  

　　The subsequent steps will run with the existing configuration  

　　of the plugin.  

　　Using existing password for root.  

　　Estimated strength of the password: 100   

　　Change the password for root ? ((Press y|Y for Yes, any other key for No) : y  

　　New password:   

　　Re-enter new password:   

　　Estimated strength of the password: 100   

　　Do you wish to continue with the password provided?(Press y|Y for Yes, any other key for No) : y  

　　By default, a MySQL installation has an anonymous user,  

　　allowing anyone to log into MySQL without having to have  

　　a user account created for them. This is intended only for  

　　testing, and to make the installation go a bit smoother.  

　　You should remove them before moving into a production  

　　environment.  

　　Remove anonymous users? (Press y|Y for Yes, any other key for No) : y  --移除匿名用户  

　　Success.  

　　Normally, root should only be allowed to connect from  

　　'localhost'. This ensures that someone cannot guess at  

　　the root password from the network.  

　　Disallow root login remotely? (Press y|Y for Yes, any other key for No) : y  --不允许远程连接  

　　Success.  

　　By default, MySQL comes with a database named 'test' that  

　　anyone can access. This is also intended only for testing,  

　　and should be removed before moving into a production  

　　environment.  

　　Remove test database and access to it? (Press y|Y for Yes, any other key for No) : y  --移除测试数据库  

　　 - Dropping test database...  

　　Success.  

 　　- Removing privileges on test database...  

　　Success.  

　　Reloading the privilege tables will ensure that all changes  

　　made so far will take effect immediately.  

　　Reload privilege tables now? (Press y|Y for Yes, any other key for No) : y  --重读授权表使前面修改生效  

　　Success.  

　　All done!   

　　

　[root@localhost ~]# mysql -u root -p   

   

　Enter password:   

　　Welcome to the MySQL monitor.  Commands end with ; or \g.  

　　Your MySQL connection id is 11  

　　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>

　　

 5. 安装成功！