I followed all the instruction by installing composer and then Laravel. Also I did everything what was shown in laracast series for installing Laravel and composer. BUT I have some problems and I cannot solve them:
I cannot launch command 'composer artisan' as it says that
[Symfony\Component\Console\Exception\CommandNotFoundException]
Command "artisan" is not defined"
"php artisan" also doesn't work
Please, tell me, how can I install Laravel correctly and use it without errors
Well. I've solved my problem. As I mentioned before I had tried all the answer in the web but nothing had helped me. So then I just deleted my laravel project and ran this command
sudo apt-get upgrade
After some time packages were upgraded and I created new Laravel project. And Laravel started working perfectly! So in any incomprehensible situation do apt-get upgrade
:))