ERROR: Unable to connect to MySQL server! Error: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

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 (/home/booklogic/domains/cms.booklogic.net/tmp) in Unknown on line 0