[1] https://ryanstutorials.net/bash-scripting-tutorial/bash-input.php
[2] https://ryanstutorials.net/bash-scripting-tutorial/bash-if-statements.php
[3] https://stackoverflow.com/questions/3061036/how-to-find-whether-or-not-a-variable-is-empty-in-bash-script
[4] https://unix.stackexchange.com/questions/86321/how-can-i-display-the-contents-of-a-text-file-on-the-command-line
[5] https://help.github.com/articles/adding-an-existing-project-to-github-using-the-command-line/
[6] https://askubuntu.com/questions/481715/why-doesnt-cd-work-in-a-shell-script
[7] https://stackoverflow.com/questions/3742983/how-to-get-the-contents-of-a-webpage-in-a-shell-variable
[8] https://stackoverflow.com/questions/617182/with-bash-scripting-how-can-i-suppress-all-output-from-a-command
[9] https://help.github.com/enterprise/2.11/admin/articles/license-files/
[10] https://stackoverflow.com/questions/4181861/src-refspec-master-does-not-match-any-when-pushing-commits-in-git
[11] https://stackoverflow.com/questions/617182/with-bash-scripting-how-can-i-suppress-all-output-from-a-command