Magento 2.0 CE problem on centos 6.5

[lapiarytool]

One or more indexers are invalid. Make sure your Magento cron job is running. When I  used System Upgrade.I need  technical help and I can pay for this.

Step 2: Readiness Check

Completed! You need to resolve these issues to continue.

Check Updater Application Availability

Updater application is available.

Check Cron Scripts

Cron script readiness check failed. Hide detail

Error from Setup Application Cron Script:
Cron job has not been configured yet
Other checks will fail as a result (PHP version, PHP settings, and PHP extensions)

Error from Updater Application Cron Script:
Cron job has not been configured yet

For additional assistance, see cron scripts help.

Check Component Dependency

Component dependency is correct.

Need Help?

PHP Documentation

PHP Version Check

Your PHP version is . The required PHP version is . Hide detail

Download and install PHP from www.php.net using this PHP Documentation.

For additional assistance, contact your hosting provider.

PHP Settings Check

Need Help?

PHP Extension Help

PHP Extensions Check

missing PHP extensions. Hide detail

The best way to resolve this is to install the correct missing extensions. The exact fix depends on our server, your host, and other system variables.
Our PHP extension help can get you started.

For additional assistance, contact your hosting provider.

[Dmitry_Fedyuk]

You should add the Magento 2 cron commands to the /etc/crontab file: https://mage2.pro/t/32

[akent99]

If you would like to get technical help, there are a number of official partners listed on the magento.com site. I am also sure you can ask around the forums and get some people interested in helping. This area is intended for asking about architectural or future directions. I am not sure exactly what the problem is you are asking for help on - do you have the cron jobs installed as per the Magento installation instructions?