Linux系统MySQL安装与卸载

安装之前虚拟机master先拍快照,方便安装错误复原重新安装

开始安装

查看虚拟机防火墙有没有关闭

没有关闭设置关闭防火墙开机自启

 

systemctl stop firewalld.service #停止firewall
systemctl disable firewalld.service #禁止firewall开机启动

 

安装mysql5.7

下载yum Repository

wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm

安装yum Repository

yum -y install mysql57-community-release-el7-10.noarch.rpm

安装mysql5.7

yum -y install mysql-community-server

 

开机自启动

systemctl enable mysqld.service

启动mysql

systemctl start mysqld.service

查看状态

systemctl status mysqld.service

 

获取临时密码

grep "password" /var/log/mysqld.log

 

登录mysql

mysql -uroot -p

 

关闭密码复杂验证

set global validate_password_policy=0;

set global validate_password_length=1;

 

设置密码

alter user user() identified by "123456";

 

修改权限

use mysql;

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION;  --修改权限

flush privileges;  --刷新权限

select host,user,authentication_string from user; --查看权限

卸载yum Repository(卸载MySQL自动更新)

因为安装了Yum Repository,以后每次yum操作都会自动更新,需要把这个卸载掉:

yum -y remove mysql57-community-release-el7-10.noarch

 

 

卸载mysql(有很多依赖文件不能筛选删除,所以建议安装之前拍快照,安装错误直接恢复重新安装)

删除依赖包

rpm -qa |grep -i mysql

yum remove mysql-community mysql-community-server mysql-community-libs mysql-community-common

 

清理文件

find / -name mysql

rm -rf 文件名

posted @ 2021-11-04 15:05  艺术派大星  阅读(227)  评论(0编辑  收藏  举报
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