centos MySQL安装与卸载

wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm

yum localinstall mysql57-community-release-el7-8.noarch.rpm

yum repolist enabled | grep "mysql.*-community.*"

yum install mysql-community-server

systemctl start mysqld

systemctl enable mysqld
systemctl daemon-reload

set password for ‘root‘@‘localhost‘=password(‘password!‘);

grant all on *.* to root@‘%‘ identified by ‘password‘ with grant option; 
flush privileges;

采用yum安装mysql后，如果想要完全卸载mysql，可以采用如下方式：
1、查看mysql安装了哪些东西

rpm -qa |grep -i mysql

 

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2、开始卸载

yum remove mysql-community-common-5.7.20-1.el7.x86_64
yum remove mysql-community-client-5.7.20-1.el7.x86_64
yum remove mysql57-community-release-el7-11.noarch
yum remove mysql-community-libs-5.7.20-1.el7.x86_64
yum removemysql-community-server-5.7.20-1.el7.x86_64

3、查看是否卸载完成

 

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4、查找mysql相关目录

find / -name mysql

 

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5、删除相关目录

rm -rf

 

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6、删除/etc/my.cnf

rm -rf /etc/my.cnf

7、删除/var/log/mysqld.log（如果不删除这个文件，会导致新安装的mysql无法生存新密码，导致无法登陆）

rm -rf /var/log/mysqld.log