Urgent help required with EMC please

OK, so only copying and pasting does not work. I will have to install what I am copying in the directory with run terminal.

OK, so here is my problem then. When I am trying to install a comp as advised by ArcEye, I am getting errors. Please see the screenshot, what is the problem? It basically does not want to install dev which I believe is required to install a comp.

Here are the instructions that I followed and there are two screenshots I am sharing, I am getting error on dev install and comp install. Can you please point it out what the problem is.

Here are the instructions I am trying to follow:

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Instructions:

in the terminal run:
sudo apt-get install emc2-dev
sudo apt-get install build-essential

Extract the emcochanger component from this text file and place it in a file named emcochanger.comp , copy this to you config file.
cd/linuxcnc/configs/ "your lathe name" /
install the component with:
sudo comp --install emcochanger.comp

Extract the hal component and add it to your .hal file.

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And that is why my linuxcnc is not running now. It gives me comp loading error.

Please help me out. I want to try my ATC code that I altered.

Tried a few other things... I will still not install my comp or dev even I think. See screenshot

Still will not install comp. I do not know why it will not find the file. I have already copied emcochanger.comp in my config directory where there are other files like hal and ini files

See screenshot.

The instructions you must have looked up must have been old. 4 or 5 years ago Linuxcnc was known as EMC2, some corporation took offense and their lawyers forced us to rename it.
The first command should have been.

I tried installing by giving full path, still errors... see screenshot

Oh my God linux is so difficult even installing something... I wish it was as easy as simply running by double clicking an exe file on windows.

and here is my comp file that i am trying to install...

If you see all my posts, I have already tried this:

And I got the this screenshot, it nothing changed at the end, is it installed now or not?