SQL database connection error

I followed this guide: https://wiki.dreamfactory.com/DreamFactory/Installation :

git stash git checkout master
git pull origin master //self-update is optional, try it if you get an error without it …/…/…/php/bin/php composer.phar self-update
../../../php/bin/php composer.phar install --no-dev …/…/…/php/bin/php artisan migrate --seed
../../../php/bin/php artisan cache:clear …/…/…/ctlscript.sh restart

Didn’t see any errors, believe it was succesfull. Would you recommend to run these lines again?