Change database port and enable remote access

For Ubuntu system,

MySQL Database:

Change config file

vi /etc/mysql/my.cnf 

1. change 'port' under Basic Setting [mysqld] to the desired port

2. comment out binding address

Run SQL command to enable 'user' access mysql database using 'password' with all privileges:

GRANT ALL PRIVILEGES ON *.* TO 'user'@'%' IDENTIFIED BY 'password';

MongoDB change port:

Change mongodb config file:

vi /etc/mongodb.conf

Check open ports: sudo netstat -anltp