MariaDB HowTo - Linux / Unix Q & A from nixCraft

Fix Host ‘IP’ is blocked because of many connection errors on MySQL/MariaDB

last updated November 15, 2017 in CentOS, Debian / Ubuntu, FreeBSD, Linux, MySQL, Suse, Troubleshooting, UNIX

I am trying to login to my mysql/mysqld server using the following Unix command:
$ mysql -u foo -h 172.16.5.100 -p dbnmame
But greeted with the following error on screen:
ERROR 1129 (HY000): Host ‘172.16.5.100’ is blocked because of many connection errors; unblock with ‘mysqladmin flush-hosts’
How do I fix this problem on a Linux or Unix-like system?

How to test PHP 7 and WordPress MySQL/MariaDB Database connectivity using a PHP script

last updated August 15, 2017 in Linux, MySQL, PHP, UNIX

I wanted to test if my PHP 7 and MySQL/MariaDB for WordPress are working. If not I wanted to see some error on screen or for my monitoring system. How to write a script for a quick PHP MySQL DB connection test for WordPress or any other database and send an email or text when site is down?

How To Install Linux, Apache, MySQL, PHP (LAMP) Stack on Debian 9 Stretch

last updated September 24, 2017 in Apache, Debian / Ubuntu, Linux, MySQL, Package Management, PHP

I am a new user of Debian 9 operating system. Can you tell me how to setup and install LAMP stack on a Debian 9 (Stretch)?

How to set up MariaDB Master-Slave replication with SSL on Ubuntu Linux

last updated July 26, 2017 in Debian / Ubuntu, Linux, MySQL

How do I setup Master-slave data replication using MariaDB server on Ubuntu Linux 16.04 LTS server? How do I encrypt replication traffic so that the data get encrypted in transit, protecting my data and users from snooping?

How to set and enable MariaDB slow query log

last updated March 29, 2017 in BASH Shell, CentOS, Debian / Ubuntu, FreeBSD, Linux, MySQL, RedHat and Friends, Suse, UNIX

I setup MariaDB server on Linux. How do I enable slow query log in MariaDB server on Linux or Unix-like system?

How to install and configure MariaDB Galera as master to master replication cluster on Ubuntu 16.04 LTS

last updated March 6, 2017 in CentOS, Debian / Ubuntu, Linux, MySQL, RedHat and Friends, Suse

How do I install and configure MariaDB Galera master to master cluster on Ubuntu Linux 16.04 LTS server to get both read and write scalability?

How to delete or remove a MySQL/MariaDB user account on Linux/Unix

last updated July 10, 2018 in Linux, MySQL, UNIX

I created a MySQL / MariaDB user account using this page. Now, I have deleted my wordpress blog and I want to delete that user account including database too. How do I delete or remove a MySQL or MariaDB user account on Linux or Unix-like system using mysql command line option?