Ahmet Emin Koçal

I also noticed that we don't need even plugging GND to RESET pin, unplugging the Atmega chip does everything

I use this method and it works like a charm:
 
void setup(){ pinMode(0,INPUT); pinMode(1,INPUT); } void loop(){ } Just upload this code, and connect GND to GND, TX to RX and RX to TX, then connect your Arduino to your computer, it will get a name like COM3, connect that com port, and you're in! You can also use PuTTY for connecting to the com port.

 
 

Nice
https://github.com/ilikenwf/apt-fast

I don't have a fiber/fast internet connection, and I get around 200kb/s download speed when I use normal apt or apt-get.
 
But apt-fast accelerates download speeds significantly. I go up to 1MB/s using it (I set max connections option to 16 while installing it, you'll know what I mean when you try to install it using apt-add-repository, of course, if you don't know). So I suggest you to use apt-fast in "armbian-config" or any system utility. This suggestion goes to the developers. So that we (users with no good internet connection) can update the system or install the desktop environment a lot faster and easier.
 

Only way is via USB and FEL mode: https://github.com/zador-blood-stained/fel-mass-storage