卸载系统自带的mariadb数据库

rpm -qa|grep mariadb
rpm -e --nodeps mariadb-libs

安装依赖文件

yum install -y perl-Module-Install.noarch
yum install -y glibc.i686
yum install -y net-toolsrpm -qa|grep mariadb
rpm -e --nodeps mariadb-libs

下载MySQL包

wget -P /root https://dev.mysql.com/get/Downloads/MySQL-5.5/MySQL-client-5.5.59-1.el7.x86_64.rpm
wget -P /root https://dev.mysql.com/get/Downloads/MySQL-5.5/MySQL-server-5.5.59-1.el7.x86_64.rpm

安装MySQL包

rpm -ivh MySQL-server-5.5.59-1.el7.x86_64.rpm --force --nodeps
rpm -ivh MySQL-client-5.5.59-1.el7.x86_64.rpm

启动MySQL

 service mysql start
 注意:
 	如果出现The server quit without updating PID file 错误,则确认第一步是否有进行操作

设置MySQL登录的账户和密码

 /usr/bin/mysqladmin -u 账户 password 密码
 注意:
 	如果没设置密码,直接用mysql命令即可登录

设置MySQL开机自启

Linux安装MySQL5.5

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