Answers for "alignment of columns in bootstrap"

laravel clear cache

php artisan cache:clear
php artisan route:clear
php artisan config:clear 
php artisan view:clear

why the laravel project have many cache

1 _  go to app/console/Kernel.php
2 _ do everything that you want in schedule like this : 

protected function schedule(Schedule $schedule)
    {
        $schedule->call(function () {
            DB::table('recent_users')->delete();
        })->daily();
    }

bootstrap 4 center div

<div class="d-flex justify-content-start">...</div>
<div class="d-flex justify-content-end">...</div>
<div class="d-flex justify-content-center">...</div>
<div class="d-flex justify-content-between">...</div>
<div class="d-flex justify-content-around">...</div>

bootstrap row no-wrap

<div class="row flex-nowrap">
    <div class="col"></div>
    <div class="col"></div>
</div>