====== why I can not purge litemage cache-from Magento admin Cache Management? ======
If you have multi-site setup but setup wrong virtual host cache root, such as in a location not without /home/$USER/lscache, or within /home/$USER/turbocache but have subfolder for each multi-site domains like the following:
   /home/$USER/turbocache/domain1.om/
   /home/$USER/turbocache/domain2.om/
   /home/$USER/turbocache/domain3.om/
   
You will run into issue that you can not purge cache from admin. Please follow our wiki to get right virtual host cache root setup.