if helpful:

RedHat Server Duplication

How to duplicate the installed packages of one RedHat system on another

postqueue guide

A simple guide to using postqueue - allowing you to manage the postfix queue

Compile python file to bytecode

A simple way to compile a python script into its bytecode version for increased speed of execution

Python packages location

A quick way to find out where the python interpreter looks for its packages

find a file containing specific text

A simple oneliner to find files containing specific text inside them

PHP encode empty objects in JSON

How to ensure PHP's json_encode() produces an object

MySQL Insert or Update

MySQL based SQL command to insert a row or update a value if the row exists

Python execfile

Python3 has removed the execfile() function, so here's a simple definition to use as a replacement

MySQL Show Columns

MySQL can display details about a table schema via standard SQL commands

Postfix Domain Rewriting

Details for configuring postfix to rewrite email domain addresses

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