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I'm having a problem with getting a shell command to clear a specific product cache because the permissions in the cache folder are strictly restricted to www-data. For example, folder /var/cache/mage--a files are like these:

-rw-------  1 www-data www-data 7646 Mar  4 11:20 mage---c54_PRODUCT_CACHE_123
-rw-------  1 www-data www-data  184 Mar  4 11:20 mage---internal-metadatas---c54_PRODUCT_CACHE_123

So when the shell command runs, it calls Mage::app()->cleanCache('PRODUCT_CACHE_123'), which triggers down to _fileGetContents function defined in lib/Zend/Cache/Backend/File.php and it's unable to open the meta file in /var/cache/mage--a due to the permissions listed above.

Does anyone have a suggested fix for this?

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    Which user executes the shell command? Let the user www-data execute the shell command or root. – HelgeB Mar 4 at 20:23
  • What do you have when you enter whoami ? – PЯINCƏ Mar 4 at 20:33
  • @HelgeB thanks for the suggestion, the shell command is run by cron so i believe it's not www-data – Long M K Nguyễn Mar 4 at 21:44
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I ended up using Redis for caches instead. This helped solve the problem as i don't need to set up file permissions for the cache folder anymore.

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