http://devdocs.magento.com/guides/v2.3/install-gde/system-requirements-tech.html

1. Go to your server root or directory where you want to install Magento 2 and open that folder in the terminal.

2. Copy following command and run it inside that folder in the terminal.
git clone git@github.com:magento/magento2.git

3. Wait until the clone download complete.

4. Now run  the following command:

composer install

5. Now run following command to give permission to cache and pub directory.

chmod-R 777 var/ pub/ generated/

chmod -R 777 app/etc/

Now fill all the information and complete the installation

OR

Please change your db-user,db-password ,db-name and other parameter value according to your database details and magento configration.

php -f bin/magento setup:install –base-url=http://m2.loc/2.07/github/ --backend-frontname=admin
--db-host=localhost --db-name=yourdbname --db-user=root --db-password=yourdbpassword --admin-firstname=Zarvis
--admin-lastname=User --admin-email=root@w3ctrl.com --admin-user=admin --admin-password=magento1223
--language=en_US --currency=USD --timezone=America/Chicago –use-rewrites=1

git@github.com:magento/magento2-sample-data.git

7. How to set permission to Magento 2 files and folder

chown -R :your web server group name

find . -type d -exec chmod g+ws {} \;

chown -R :your web server group name

find . -type d -exec chmod g+ws {} \;

8. Clear cache using follwoing command

Go to Magento 2 var/ folder
rm -rf cache/* page_cache/* generation/*

9. Run the following commands to install sample data:
php bin/magento setup:upgrade

php bin/magento setup:di:compile

php bin/magento setup:upgrade
php bin/magento setup:di:compile

Please view the following video for magento 2 installtion

Thanks