Piwik # Web Analytics

Error: Unable to start session. Please check that the web server has enough permission to write to these files/directories:
For example, on a Linux server if your Apache httpd user is www-data, you can try to execute:
chown -R www-data:www-data /var/www/piwik/tmp/sessions/
chmod -R 0755 /var/www/piwik/tmp/sessions/

Debug: the original error was 
Zend_Session::start() - /var/www/piwik/libs/Zend/Session.php(Line:469): Error #2 session_start() [function.session-start]: open(/var/www/piwik/tmp/sessions/sess_1b70d5d34a9657e729901853ac550440, O_RDWR) failed: No space left on device (28) Array
/var/www/piwik/libs/Zend/Session.php(Line:479): Error #2 session_write_close() [function.session-write-close]: open(/var/www/piwik/tmp/sessions/sess_1b70d5d34a9657e729901853ac550440, O_RDWR) failed: No space left on device (28) Array
/var/www/piwik/libs/Zend/Session.php(Line:479): Error #2 session_write_close() [function.session-write-close]: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/var/www/piwik/tmp/sessions) Array

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