Downloading necessary files.
Save this file in your home directory with the name git-completion.bash.
wget https://raw.githubusercontent.com/sungjae-cho/git-practice/master/git-completion.bash
Save this file in your home directory with the name git-prompt.sh.
wget https://raw.githubusercontent.com/sungjae-cho/git-practice/master/git-prompt.sh
Download bash_profile_course here.
wget https://raw.githubusercontent.com/sungjae-cho/git-practice/master/bash_profile_course
If you already have a file in your home directory named .bashrc, copy the content from bash_profile_course and paste it at the bottom of .bashrc.
Otherwise, move bash_profile_course to your home directory and rename it to .bashrc.