[转]CentOS 7.x 卸载删除MariaDB，重新安装

1、卸载

[ ~]# rpm -qa|grep mariadb
mariadb-5.5.56-2.el7.x86_64
mariadb-libs-5.5.56-2.el7.x86_64
mariadb-server-5.5.56-2.el7.x86_64
[root@node1 ~]#

[ ~]# yum remove mariadb
...
Removed:
  mariadb.x86_64 1:5.5.56-2.el7                                                                                                                  

Dependency Removed:
  mariadb-server.x86_64 1:5.5.56-2.el7                                                                                                           

Complete!
[root@node1 ~]#

2、删除遗留目录

[ ~]# ls /etc/my.cnf
/etc/my.cnf
[root@node1 ~]# ll /var/lib/mysql/
total 28700
-rw-rw---- 1 mysql mysql    16384 May  5 10:31 aria_log.00000001
-rw-rw---- 1 mysql mysql       52 May  5 10:31 aria_log_control
-rw-rw---- 1 mysql mysql 18874368 May  5 10:31 ibdata1
-rw-rw---- 1 mysql mysql  5242880 May  5 10:31 ib_logfile0
-rw-rw---- 1 mysql mysql  5242880 Oct  6  2017 ib_logfile1
drwx------ 2 mysql mysql     4096 Oct  6  2017 mysql
drwx------ 2 mysql mysql     4096 Oct  6  2017 performance_schema
[root@node1 ~]#

[ ~]# rm -rf /etc/my.cnf
[ ~]# rm -rf /var/lib/mysql/

3、重新安装

[ ~]# yum install -y mariadb mariadb-server
[ ~]# systemctl start mariadb
[ ~]# systemctl enable mariadb
[ ~]# mysql_secure_installation

From: https://blog.csdn.net/chengyuqiang/article/details/80210416

补充：

mysql_secure_installation可参考： https://baijiahao.baidu.com/s?id=1645005043180459694