cd YOUR_PROJECT_FOLDER

that means, you should "change directory" to the folder where your project files are.

Replace YOUR_PROJECT_FOLDER with path to the folder where the files are, in your case, ~/www/imagehostnow.com

git pull origin master

It failed to pull changes from report to local as some files are changed on your PC.

If the change you need to keep, then you need to make commit (make a new branch, never commit on master branch).

For now, what you need to do is delete the changed file "bootstrap/start.php", then run "git pull origin master" again, it should work.

Post result after doing it.