'sudo' is not recognized as an internal or external command

Are you running Windows?

Yes sir @ Tray2

I suggest you to follow this article steps https://www.cloudways.com/blog/install-laravel-5-4-localhost/

There is no such thing as sudo or chmod in Windows. You can ignore those commands.

The instruction is for Mac and Linux machines.

Ok, They should have mentioned that. I am trying to install this Larave-auth

https://github.com/jeremykenedy/laravel-auth.

There are not that many using Windows as dev machines. I would also recommend that you switch to a linux virtual machine for you dev. It's much easier to follow in the tutorials and most of the web servers out there are running some kind of *nix.

• You can use Homestead https://laravel.com/docs/5.6/homestead

Or you can build your own

• Nginx: https://www.howtoforge.com/tutorial/ubuntu-laravel-php-nginx/
• Apache: https://www.howtoforge.com/tutorial/install-laravel-on-ubuntu-for-apache/

Can I able to install now to skip the Linux command?

Since it has to do with permissions and Windows another solution for it's permissions so probably yes.