By default MySQL keeps a log of all transactions, if you don’t limit this in “my.cnf” it will keep growing and keep creating “mysql-bin.XXXXX” files. To delete these files and potentially free up lots of disk space do the following:

If you are using DirectAdmin first find out the admin user account for MySQL:

cat /usr/local/directadmin/conf/mysql.conf

Then connect to MySQL:

mysql -u ADMINACCOUNT -p

Input the password and when you are connected purge the files by issueing the following command:

PURGE BINARY LOGS BEFORE '2016-03-31 23:59:59'; 

Disconnect from MySQL and check how many space is won by typing:

df -h