[SOLVED] How to uninstall MariaDB 5.5 completely (including configurations) from CentOS 7

Issue

I tried command

yum remove mariadb mariadb-server

It removed the client but failed to remove the server.

error reading information on service mysql: No such file or directory
error: %preun(MariaDB-server-5.5.41-1.el7.centos.x86_64) scriptlet failed, exit status 1
Error in PREUN scriptlet in rpm package MariaDB-server-5.5.41-1.el7.centos.x86_64
error: MariaDB-server-5.5.41-1.el7.centos.x86_64: erase failed
Erasing    : MariaDB-client-5.5.41-1.el7.centos.x86_64                                                                                        1/2 
Verifying  : MariaDB-client-5.5.41-1.el7.centos.x86_64                                                                                        1/2 
Verifying  : MariaDB-server-5.5.41-1.el7.centos.x86_64                                                                                        2/2 

Removed:
MariaDB-client.x86_64 0:5.5.41-1.el7.centos                                                                                                       

Failed:
MariaDB-server.x86_64 0:5.5.41-1.el7.centos 

Any suggestions?

Solution

I reinstalled MariaDB and then uninstalled using rmp not yum. Below are the steps I performed-

Downloaded the required RPMs

wget http://archive.mariadb.org/mariadb-5.5.41/yum/centos7-amd64/rpms/MariaDB-5.5.41-centos7_0-x86_64-client.rpm
wget http://archive.mariadb.org/mariadb-5.5.41/yum/centos7-amd64/rpms/MariaDB-5.5.41-centos7_0-x86_64-common.rpm
wget http://archive.mariadb.org/mariadb-5.5.41/yum/centos7-amd64/rpms/MariaDB-5.5.41-centos7_0-x86_64-server.rpm

Install it again

rpm -ivh MariaDB-5.5.41-*.rpm

Erase packages

rpm -e `rpm -qa | grep MariaDB` --noscripts

Remove the config files

rm -rf /var/lib/mysql
rm /etc/my.cnf

Answered By - Newton Sarker

Answer Checked By - Dawn Plyler (WPSolving Volunteer)