I can't login to my centos webpanel display mysqli_connect(): (HY000/2002)

Please I need to fix this as soon as possible, I discovered my website was hacked and I tried to fix it but discovered the website started displaying internal server error. So I decided to reboot the server then I can't access the centos webpanel anymore but display the message below


Warning: mysqli_connect(): (HY000/2002): No such file or directory in /usr/local/cwpsrv/htdocs/resources/admin/include/functions.php on line 0

Warning: mysqli_connect(): (HY000/2002): No such file or directory in /usr/local/cwpsrv/htdocs/resources/admin/include/functions.php on line 0

Warning: mysqli_connect(): (HY000/2002): No such file or directory in /usr/local/cwpsrv/htdocs/admin/admin/index.php on line 0

Warning: mysqli_connect(): (HY000/2002): No such file or directory in /usr/local/cwpsrv/htdocs/admin/admin/index.php on line 0


DISK FULL: Can't start MySQL!


Warning: mysqli_error() expects exactly 1 parameter, 0 given in /usr/local/cwpsrv/htdocs/admin/admin/index.php on line 0
Could not connect:


Please I need help as soon as possible.

Hey, you have all information you need in the message with CapsLock "DISK FULL: Can't start MySQL!"
Delete some unrequired files, clean logs and restart the server.