Linux下彻底卸载MySQL数据库
一、检查服务器是否已经安装了MySQL
rpm -qa|grep mysql
如下所示
mysql-community-libs-compat-8.1.0-1.el7.x86_64
mysql-community-server-8.1.0-1.el7.x86_64
mysql-community-icu-data-files-8.1.0-1.el7.x86_64
mysql-community-common-8.1.0-1.el7.x86_64
php-mysqlnd-7.3.33-1.el7.remi.x86_64
mysql-community-libs-8.1.0-1.el7.x86_64
mysql-community-client-plugins-8.1.0-1.el7.x86_64
mysql-community-client-8.1.0-1.el7.x86_64
二、查看MySQL服务是否开启
systemctl status mysqld
如下所示：
mysqld.service - MySQL ServerLoaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)Active: active (running) since Tue 2024-02-20 15:24:50 CST; 9s agoDocs: man:mysqld(8)http://dev.mysql.com/doc/refman/en/using-systemd.htmlProcess: 30152 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS)Main PID: 30194 (mysqld)Status: "Server is operational"Tasks: 38CGroup: /system.slice/mysqld.service└─30194 /usr/sbin/mysqldFeb 20 15:24:45 i2MaskingCtrl systemd[1]: Starting MySQL Server...
Feb 20 15:24:50 i2MaskingCtrl systemd[1]: Started MySQL Server.
如开启则关闭MySQL服务，执行以下命令：
systemctl stop mysqld
三、查找含有MySQL的目录
find / -name mysql
如下所示：
/etc/logrotate.d/mysql
/var/lib/mysql
/var/lib/mysql/mysql
/usr/bin/mysql
/usr/lib64/mysql
根据自己查找出来的目录进行依次删除：
rm -rf /etc/logrotate.d/mysql /var/lib/mysql /var/lib/mysql/mysql /usr/bin/mysql /usr/lib64/mysql
还需删除以下两个目录：
//mysql的配置文件
rm -rf /etc/my.cnf
//如果不删除这个文件,则重新安装的Mysql将无法设置password
rm -rf /var/log/mysqld.log
四、查找MySQL安装的组件服务
rpm -qa|grep -i mysql
如下所示：
mysql-community-libs-compat-8.1.0-1.el7.x86_64
mysql-community-server-8.1.0-1.el7.x86_64
mysql-community-icu-data-files-8.1.0-1.el7.x86_64
mysql-community-common-8.1.0-1.el7.x86_64
php-mysqlnd-7.3.33-1.el7.remi.x86_64
mysql-community-libs-8.1.0-1.el7.x86_64
mysql-community-client-plugins-8.1.0-1.el7.x86_64
mysql-community-client-8.1.0-1.el7.x86_64
卸载并删除查找出来的组件服务：
rpm -ev mysql-community-libs-compat-8.1.0-1.el7.x86_64
rpm -ev mysql-community-server-8.1.0-1.el7.x86_64
rpm -ev mysql-community-icu-data-files-8.1.0-1.el7.x86_64
rpm -ev mysql-community-common-8.1.0-1.el7.x86_64
rpm -ev mysql-community-libs-8.1.0-1.el7.x86_64
rpm -ev mysql-community-client-plugins-8.1.0-1.el7.x86_64
rpm -ev mysql-community-client-8.1.0-1.el7.x86_64注：如果删除不了则加上--nodeps。例如：rpm -ev --nodeps mysql-community-libs-compat-8.1.0-1.el7.x86_64
五、卸载完成后检查是否卸载成功
rpm -qa|grep -i mysql
php-mysqlnd-7.3.33-1.el7.remi.x86_64
systemctl start mysql
如报错Failed to start mysql.service: Unit not found.
则说明此时mysql已经卸载干净了。