update files from github

how can i update my website from github. What a command do i need use. example - this command reload all my site from github.

If you used the script to create your site, you can start a Bash console and use the cd command to navigate to the directory that contains your source code, then run the git pull command to pull the latest version from github.

Can you explain in details with each explanation

That was a pretty detailed description. Which bit are you having trouble with?