SSH matters

Generate Keys

sudo apt update  
sudo apt install openssh-client
ssh-keygen -t rsa -b 4096 -C "your_email@example.com"
eval "$(ssh-agent -s)"
ssh-add ~/.ssh/id_rsa
cp id_rsa.pub to GitHub setup

Extend Session Time

Add it to ~/.ssh/config

Host *
  ServerAliveInterval 60
  ServerAliveCountMax 120