1.查看mysql状态 systemctl status mysqld 2. 关闭mysql服务 systemctl stop mysqld 3...

1.下载yum源 wget https://repo.mysql.com//mysql57-community-release-el7-11.n...

1.准备好安装文件，并且传到服务器上 下载地址：https://dev.mysql.com/downloads/mysql/5.5.html m...

1.下载linux版本jdk1.7 下载地址：http://www.oracle.com/technetwork/java/javase/d...