1. 卸载centos7自带MariaDB

rpm –qa | grep mariadb

rpm -e --nodeps mariadb-libs-5.5.52-1.el7.x86_64

2. 下载mysql版本 （等待下载完成）

wget http://ftp.ntu.edu.tw/MySQL/Downloads/MySQL-5.6/MySQL-5.6.45-1.el7.x86_64.rpm-bundle.tar
wget http://mirrors.ustc.edu.cn/mysql-ftp/Downloads/MySQL-5.6/MySQL-5.6.45-1.el7.x86_64.rpm-bundle.tar

3. 解压文件

tar -xvf MySQL-5.6.42-1.el7.x86_64.rpm-bundle.tar

4. 安装

rpm -ivh MySQL-server-5.6.42-1.el7.x86_64.rpm
rpm -ivh MySQL-devel-5.6.42-1.el7.x86_64.rpm
rpm -ivh MySQL-client-5.6.42-1.el7.x86_64.rpm

5. 启动

service mysql start

6. 打开mysql输入

msyql

7. 创建mysql用户

grant all privileges on *.* to mysql@'%' identified by '123456' with grant option;
flush privileges;

8. 如果有些配置不生效重启mysql

service msyql restart;

所遇问题

安装过程中如果需要依赖包请自行yum安装

• 问题1

warning: MySQL-server-5.6.42-1.el7.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
error: Failed dependencies:
perl(Data::Dumper) is needed by MySQL-server-5.6.42-1.el7.x86_64

• 解决办法：

cd /etc/pki/rpm-gpg
rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY*
yum -y install perl perl-devel perl-Data-Dumper
如果还不行：rpm -ivh MySQL-server-5.6.42-1.el7.x86_64.rpm --force --nodeps 强安装

• 问题2：启动时如果报错：

Starting MySQL.Logging to '/var/lib/mysql/izuf66sgxgoyt19dbhtlqdz.err'.
.The server quit without updating PID file (/var/lib/mysql/[FAILED]xgoyt19dbhtlqdz.pid).

• 解决办法：

cat /var/lib/mysql/izuf66sgxgoyt19dbhtlqdz.err

执行： mysql_install_db --user=mysql --ldata=/var/lib/mysql/