RPM包安装方式的MySQL卸载
1：检查是否安装了MySQL组件
[root@DB-Server init.d]# rpm -qa | grep -i mysql MySQL-devel-5.6.23-1.linux_glibc2.5 MySQL-client-5.6.23-1.linux_glibc2.5 MySQL-server-5.6.23-1.linux_glibc2.5 如上所示，说明安装了MySQL 5.6.23这个版本的client、server、devel三个组件。
2：卸载前关闭MySQL服务
[root@DB-Server init.d]# service mysqld status MySQL running (25673)[ OK ] [root@DB-Server init.d]# service mysqld stop Shutting down MySQL..[ OK ] [root@DB-Server init.d]# service mysqld status MySQL is not running[FAILED] 3. 收集MySQL对应的文件夹信息 [root@DB-Server init.d]# whereis mysql mysql: /usr/bin/mysql /usr/include/mysql /usr/share/mysql /usr/share/man/man1/mysql.1.gz [root@DB-Server init.d]# find / -name mysql /etc/rc.d/init.d/mysql /etc/logrotate.d/mysql /var/lock/subsys/mysql /var/lib/mysql /var/lib/mysql/mysql /usr/include/mysql /usr/include/mysql/mysql /usr/bin/mysql /usr/share/mysql /usr/lib64/mysql
4：卸载删除MySQL各类组件
[root@DB-Server init.d]# rpm -ev MySQL-devel-5.6.23-1.linux_glibc2.5 [root@DB-Server init.d]# rpm -ev MySQL-server-5.6.23-1.linux_glibc2.5 You have new mail in /var/spool/mail/root [root@DB-Server init.d]# rpm -ev MySQL-client-5.6.23-1.linux_glibc2.5 5：删除MySQL对应的文件夹，检查各个MySQL文件夹是否清理删除干净。 [root@DB-Server init.d]# whereis mysql mysql: [root@DB-Server init.d]# find / -name mysql /var/lib/mysql /var/lib/mysql/mysql /usr/lib64/mysql [root@DB-Server init.d]# rm -rf /var/lib/mysql [root@DB-Server init.d]# rm -rf /var/lib/mysql/mysql [root@DB-Server init.d]# rm -rf /usr/lib64/mysql 6：删除mysql用户及用户组[root@DB-Server ~]# more /etc/passwd | grep mysql mysql:x:101:501::/home/mysql:/bin/bash [root@DB-Server ~]# more /etc/shadow | grep mysql mysql:!!:16496:::::: [root@DB-Server ~]# more /etc/group | grep mysql mysql:x:501: [root@DB-Server ~]# userdel mysql [root@DB-Server ~]# groupdel mysql groupdel: group mysql does not exist 7：确认MySQL是否卸载删除 [root@DB-Server init.d]# rpm -qa | grep -i mysql
二进制包/源码安装方式的MySQL卸载
1：检查MySQL服务并关闭服务进程。
[root@DB-Server init.d]# ps -ef | grep mysql root 4752 4302 0 22:55 pts/1 00:00:00 more /etc/init.d/mysql.server root 7176 1 0 23:23 pts/1 00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/usr/local/mysql/data --pid-file=/usr/local/mysql/data/DB-Server.localdomain.pid mysql 7269 7176 15 23:23 pts/1 00:00:01 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/usr/local/mysql/data/DB-Server.localdomain.err --pid-file=/usr/local/mysql/data/DB-Server.localdomain.pid root 7321 4302 0 23:23 pts/1 00:00:00 grep mysql [root@DB-Server init.d]#service mysqld status MySQL running (7269)[ OK ] [root@DB-Server init.d]#service mysqld stop Shutting down MySQL..[ OK ] [root@DB-Server init.d]#service mysqld status MySQL is not running[FAILED] 2：查找MySQL的安装目录并彻底删除 [root@DB-Server init.d]# whereis mysql mysql: /usr/local/mysql [root@DB-Server init.d]# find / -name mysql /var/spool/mail/mysql /usr/local/mysql-5.7.5-m15-linux-glibc2.5-x86_64/include/mysql /usr/local/mysql-5.7.5-m15-linux-glibc2.5-x86_64/bin/mysql /usr/local/mysql-5.7.5-m15-linux-glibc2.5-x86_64/data/mysql /usr/local/mysql [root@DB-Server init.d]# rm -rf /usr/local/mysql-5.7.5-m15-linux-glibc2.5-x86_64/ [root@DB-Server init.d]# rm -rf /usr/local/ [root@DB-Server init.d]# rm -rf /var/spool/mail/mysql 3：删除一些配置文件
配置文件一般有/etc/my.cnf 或/etc/init.d/mysql.server，视具体安装配置情况而定。
4：删除MySQL用户以及用户组
[root@DB-Server ~]# id mysql uid=101(mysql) gid=501(mysql) groups=501(mysql) context=root:system_r:unconfined_t:SystemLow-SystemHigh [root@DB-Server ~]# userdel mysql
