Magento shows Error 503: Service Temporarily Unavailable page after extension installation via Magento Connect or scheduling a backup:
Service Temporarily Unavailable
The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.
You need to follow these steps:
- Go to magento root directory via DirectAdmin Web Control Panel/FTP
- In case of Magento1, you will find maintenance.flag and delete it
- In case of Magento2, delete var/maintenance.flag