How to install MongoDB on Centos7 part2 and fix about smallpages start issue

How to install mongoDB on Centos7

Here a quick how to video about MongoDB install on Centos7:

MariaDB how to connect database

Here a quick video about how to connect to a MariaDB database :

How to connect Postgresl database

How to connect Postgresl database
Here a quick how to video about Postgresl PSQL connection :