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Open your terminal using Ctrl+Alt+T
and type the following commands
composer global require "laravel/installer"
cd
sudo nano .bashrc
export PATH="$PATH:$HOME/.config/composer/vendor/bin"
source ~/.bashrc
laravel new blog
cd blog
composer install
php artisan serve
Open a web browser and visit localhost:8000
to see the laravel welcome page
Terminate php server in terminal by pressing Ctrl+C
Thus you have successfully installed laravel globally.