CentOS7 安裝MySQL

這段時間在安裝mysql時候遇到點問題，原先的yum安裝安裝不上，因而本身採用rpm安裝mysql；

mysql須要的rpm包下載地址：http://repo.mysql.com/yum/

選擇你本身想要安裝的版本，打開以後會是這樣的。

 

1. 首先清除centos7系統中默認的數據庫mariadb，不然不能安裝mysql。

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

2.下載mysql的相關rpm包

　

  關於下載問題，你能夠直接使用wget + 包的URL 下載到一個臨時文件（個人是/tmp/download文件）

 

 

   注意：每一個安裝包版本號是同樣的，不然後面安裝會出現問題；意味着每一個文件都是以5.7.19-1.el7.x86_64.rpm結尾的

3.切換到下載包目錄下（cd 你的下載目錄），而後對每一個包進行一次安裝；

  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

　在安裝最後一個mysql-community-server的時候可能會出現下面的錯誤提示：

 

  解決這個問題是由於系統缺乏了libaio這個庫，咱們安裝好就能夠了。

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

這時候就能夠安裝mysql-community-server;

 

4.查看安裝mysql時候生成的臨時密碼，這個臨時密碼放在了mysql日誌文件中了。（對於Mysql 5.7.6之後的5.7系列版本，Mysql使用mysqld --initialize或mysqld --initialize-insecure命令來初始化數據庫，後者能夠不生成臨時密碼。）

[root@localhost ~]# cat /etc/my.cnf  

 log-error=/var/log/mysqld.log  --找到日誌路徑  

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

 

[root@localhost  ~]# /usr/bin/mysql_secure_installation --安裝完mysql後執行自帶的安全設置  

    

 Securing the MySQL server deployment.  

　　Enter password for user root:   --輸入剛找到的臨時密碼

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

　　New password:     --設置新的密碼

　　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  --移除匿名用戶  

　　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  --不容許遠程鏈接  

　　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  --移除測試數據庫  

　　 - 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  --重讀受權表使前面修改生效  

　　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. 安裝成功！