php sessions wite issues

My server is throwing the following error... Warning: Unknown: write failed: No space left on device (28) in Unknown on line 0 Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/var/lib/php/sessions) in Unknown on line 0 using php5.6 my guess is in [login to view URL] I need to create a custom path and maybe in httpd as well. either way just need to get it fixed. this is a small project and will not take much time at all.