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Linux系統版本：CentOS7.4
MySQL版本：5.7.28
在Linux平臺有RPM包、二進制包、源碼包3中安裝方式，這一篇文章主要是以RPM包為例來介紹如何在Linux平臺下進行MySQL的安裝。
下載地址：
https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.28-linux-glibc2.12-x86_64.tar.gz
具體安裝步驟如下：
（1）首先卸載mariadb，不然后面會和安裝mysql需要的庫沖突：
[root@localhost ~]# rpm -qa | grep mariadb mariadb-libs-5.5.56-2.el7.x86_64 [root@localhost ~]# rpm -e --nodeps mariadb-libs-5.5.56-2.el7.x86_64
（2）用root用戶登錄系統，增加mysql用戶和組，數據庫安裝在此用戶下：
[root@localhost ~]# groupadd mysql [root@localhost ~]# useradd -r -g mysql -s /bin/false mysql
（3）準備數據目錄
以/app/data為例,建議使用邏輯卷
[root@localhost ~]# mkdir -p /app/data [root@localhost ~]# chown mysql.mysql /app/data/ [root@localhost ~]# chmod 750 /app/data
（4）準備二進制文件：
[root@localhost ~]# tar xvf mysql-5.7.28-linux-glibc2.12-x86_64.tar.gz -C /usr/local/ root@localhost ~]# cd /usr/local [root@localhost local]# ln -sv mysql-5.7.28-linux-glibc2.12-x86_64 mysql ‘mysql' -> ‘mysql-5.7.28-linux-glibc2.12-x86_64'
（5）初始化MySQL：
[root@localhost ~]# cd /usr/local/mysql [root@localhost mysql]# bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/app/data 2019-11-03T09:47:18.263716Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 2019-11-03T09:47:19.059462Z 0 [Warning] InnoDB: New log files created, LSN=45790 2019-11-03T09:47:19.140866Z 0 [Warning] InnoDB: Creating foreign key constraint system tables. 2019-11-03T09:47:19.207569Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: ed1cd8ec-fe1e-11e9-8c9c-000c29f8617a. 2019-11-03T09:47:19.209181Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened. 2019-11-03T09:47:19.646366Z 0 [Warning] CA certificate ca.pem is self signed. 2019-11-03T09:47:20.056792Z 1 [Note] A temporary password is generated for root@localhost: rY-6f??#!<zO
其中--basedir mysql基礎目錄 --datadir mysql數據存放目錄，并創建了root用戶的臨時密碼：rY-6f??#!<zO
（6）開啟ssl連接：
[root@localhost mysql]# bin/mysql_ssl_rsa_setup 2019-11-03 23:09:55 [ERROR] Failed to access directory pointed by --datadir. Please make sure that directory exists and is accessible by mysql_ssl_rsa_setup. Supplied value : /usr/local/mysql/data [root@localhost mysql]# bin/mysql_ssl_rsa_setup --datadir=/app/data
命令后面不加參數報錯，加了--datadir后不報錯
（7）編輯配置文件，保存退出：
[root@localhost mysql]# vim /etc/my.cnf [mysqld] # GENERAL datadir=/app/data socket=/app/data/mysql.sock user=mysql default-storage-engine=InnoDB [mysqld_safe] log-error=/app/data/mysql-error.log pid-file=/app/data/mysqld.pid [client] socket=/app/data/mysql.sock
（8）啟動MySQL：
[root@localhost mysql]# bin/mysqld_safe --user=mysql &
（9）配置環境變量：
[root@localhost ~]# vim /etc/profile #添加下面一行 export PATH=$PATH:/usr/local/mysql/bin [root@localhost ~]# source /etc/profile
（10）設置開機啟動：
[root@localhost mysql]# cp support-files/mysql.server /etc/init.d/mysql.server [root@localhost mysql]# chkconfig --add mysql.server
（11）測試登錄成功：
[root@localhost ~]# mysql -uroot -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 2 Server version: 5.7.28 Copyright (c) 2000, 2019, 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>
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