Magento

System Requirements

System Requirements for 1.9.3.1:

• PHP 5.6
• PHP Memory Limit: 256MB or higher
• MySQL 5.6
• Required PHP Extensions:
• PHP_MySQL
• simplexml
• mcrypt
• has
• GD
• DOM
• iconv
• curl
• SOAP

File Permissions (500 Errors)

If you get an Internal Server Error 500, the most likely cause is bad file permissions. Set the permissions as follows:

Directories: 755
Files: 644

Maintenance Mode

If the site says it is in maintenance mode:

Delete the file: .maintenanceFlag from the Magento root directory

Upgrading

To upgrade Magento from the Connect Manager:

1. Flush the cache (System>>Cache Management)
2. Disable the cache
3. Disable Compilation (System>>Tools>>Compilation)
4. Go to Connect Manager (System>>Magento Connect>>Magento Connect Manager
5. click the "Check for Updates" button
   (You can use the following extension key if new updates don't show up:
   http://connect20.magentocommerce.com/community/Mage_All_Latest)
6. Select updates, click "Update"
7. Wait....
8. Click "Refresh"
9. Check the file permissions (They are likely messed up.)
10. delete .maintenanceFlag
11. Re-index, re-enable cache, re-enable compilation

References

1. Magento Home Page