Laravelni o'rnatganda chiqadigan xatoni bartaraf etish

Error in exception handler: The stream or file "/var/www/laravel/app/storage/logs/laravel.log" could not be opened: failed to open stream: Permission denied in /var/www/laravel/bootstrap/compiled.php:8423

sudo chown -R $USER:www-data storage
sudo chown -R $USER:www-data bootstrap/cache

chmod -R 775 storage
chmod -R 775 bootstrap/cache

Update:
Webserver user and group depend on your webserver and your OS. to figure out what's your web server user and group use the following commands. for nginx use:

ps aux|grep nginx|grep -v grep

for apache use:

ps aux | egrep '(apache|httpd)'