git clone - get repository from server

git checkout [branch_name] - switch branch

git pull - sync local branch with remote one

git add [path/to/file] - prepare local changes in selected file to commit

git commit -m "commit message" - commit staged files with "commit message"

git push origin [branch_name] - push local branch to remote one

Clone remote repository

Checkout to the appropriate branch

Don't forget to pull branch one time per day at least

Commit your changes into the appropriate folder in the repository

Into terminal run command for generate SSH KEY:

ssh-keygen -t rsa -C "your_email@example.com"

ssh-add id_rsa

Install xclip for copy SSH KEY:

sudo apt-get install xclip

xclip -sel clip < ~/.ssh/id_rsa.pub