I was lazy at writing bash or python scripts previously, but somehow I notices after some new experiences, I have to write the scripts more accurately locally independently...

So I have 3 OSes installed in parallel for both 2 laptops, 2 station like more powerful machines, and another Server in linux.

The demand for use of bash and python in more advanced ways is calling.

I am focusing on the use of pure desktop Linux sys and coding scripts in laptop portable...

The other 5 regular machines are sometimes by occasion used for different purposes.

BTW:

I used to use winPE or ultra iso to install OSes, because they have different installation mechnisms.

But recently I have found a new tool which is really convenient, and I can say goodbye to those useless ios to USB ways. 

Ventory is a multi iso installation tool to install to USB disk, it can scan ISOs automatically and list them for installation choices.

Ventory needs to disable SecureBoot in BIOS.

Ventory seems to have issue installing 32bit Sys ISO to x64 based PC.

It can install Windows, Ubuntu, CentOS, etc, really cool!