Upgrade MYSQL version

Backup Entire Database

cat /usr/local/directadmin/conf/mysql.conf
use the username and password
mysqldump -u user01 -p --all-databases > all_databases_backup.sql

OR

Login directAdmin
Backup system file

Edit the following path's mysql version
/usr/local/directadmin/custombuild/options.conf
mysql=5.1 (version need upgrade)
mysql_inst=yes
mysql_backup=yes

cd /usr/local/directadmin/custombuild/
./biuld mysql
./build php n

check php
php -i

check mySQL
/etc/init.d/mysqld status