diff --git a/install-nextcloud.sh b/install-nextcloud.sh
index 2bfded6..8e403c8 100644
--- a/install-nextcloud.sh
+++ b/install-nextcloud.sh
@@ -3,7 +3,7 @@
 # https://www.c-rieger.de
 # https://github.com/riegercloud
 # INSTALL-NEXTCLOUD.SH
-# Version 4.0 ARM64
+# Version 4.0 AMD64
 # July, 26th, 2018
 ############################################
 # Ubuntu 18.04 LTS AMD64 - Nextcloud 13.0.5
@@ -30,6 +30,23 @@ sudo -u www-data php /var/www/nextcloud/occ files:scan-app-data
 fail2ban-client status nextcloud
 ufw status verbose
 }
+###global function to show information regarding the upcoming MariaDB dialogue
+function mariadbinfo() {
+clear
+echo ""
+echo "*********************************************************"
+echo "You will be asked to set the MariaDB root password twice."
+echo " "
+echo "Please just confirm the dialogue (ENTER)."
+echo "You will be asked again to set the root pwd"
+echo "while harden your MariaDB Server!"
+echo "*********************************************************"
+echo ""
+echo "Press ENTER to install MariaDB"
+read
+clear
+}
+### START ###
 cd /usr/local/src
 update_and_clean
 ###prepare the server environment
@@ -189,44 +206,102 @@ mount -a
 service php7.2-fpm restart
 service nginx restart
 ###install MariaDB
-apt install mariadb-server -y
+apt-key adv --recv-keys --keyserver hkp://keyserver.ubuntu.com:80 0xF1656F24C74CD1D8
+if [ ! -f /etc/apt/sources.list.d/mariadb.list ]; then
+cat <<EOF > /etc/apt/sources.list.d/mariadb.list
+deb [arch=amd64] http://ftp.hosteurope.de/mirror/mariadb.org/repo/10.3/ubuntu bionic main
+deb-src http://ftp.hosteurope.de/mirror/mariadb.org/repo/10.3/ubuntu bionic main
+EOF
+fi
+mariadbinfo
+apt update && apt install mariadb-server -y
+/usr/sbin/service mysql stop
 ###configure MariaDB
 mv /etc/mysql/my.cnf /etc/mysql/my.cnf.bak
-touch /etc/mysql/my.cnf
 cat <<EOF >/etc/mysql/my.cnf
-[server]
+[client]
+port = 3306
+socket = /var/run/mysqld/mysqld.sock
+default-character-set = utf8mb4
+
+[mysqld_safe]
+socket = /var/run/mysqld/mysqld.sock
+nice = 0
+
+[mysqld]
+user = mysql
+pid-file = /var/run/mysqld/mysqld.pid
+socket = /var/run/mysqld/mysqld.sock
+port = 3306
+basedir = /usr
+datadir = /var/lib/mysql
+tmpdir = /tmp
+lc_messages_dir = /usr/share/mysql
+lc_messages = en_US
+skip-external-locking
 skip-name-resolve
-innodb_buffer_pool_size = 128M
+bind-address = 127.0.0.1
+max_connections = 200
+connect_timeout = 5
+wait_timeout = 600
+max_allowed_packet = 16M
+thread_cache_size = 128
+sort_buffer_size = 4M
+bulk_insert_buffer_size = 16M
+tmp_table_size = 64M
+max_heap_table_size = 64M
+myisam_recover_options = BACKUP
+key_buffer_size = 128M
+#open-files-limit = 2000
+table_open_cache = 400
+myisam_sort_buffer_size = 512M
+concurrent_insert = 2
+read_buffer_size = 2M
+read_rnd_buffer_size = 1M
+query_cache_limit = 2M
+query_cache_size = 64M
+query_cache_type = 1
+query_cache_min_res_unit = 2k
+log_warnings = 2
+slow_query_log_file = /var/log/mysql/mariadb-slow.log
+long_query_time = 1
+log_slow_verbosity = query_plan
+slow-query-log = 1
+slow-query-log-file = /var/log/mysql/slow.log
+log_bin = /var/log/mysql/mariadb-bin
+log_bin_index = /var/log/mysql/mariadb-bin.index
+expire_logs_days = 10
+max_binlog_size = 100M
+default_storage_engine = InnoDB
+innodb_buffer_pool_size = 256M
 innodb_buffer_pool_instances = 1
 innodb_flush_log_at_trx_commit = 2
 innodb_log_buffer_size = 32M
 innodb_max_dirty_pages_pct = 90
-query_cache_type = 1
-query_cache_limit = 2M
-query_cache_min_res_unit = 2k
-query_cache_size = 64M
-tmp_table_size= 64M
-max_heap_table_size= 64M
-slow-query-log = 1
-slow-query-log-file = /var/log/mysql/slow.log
-long_query_time = 1
-
-[client-server]
-!includedir /etc/mysql/conf.d/
-!includedir /etc/mysql/mariadb.conf.d/
-
-[client]
-default-character-set = utf8mb4
-
-[mysqld]
+innodb_file_per_table = 1
+innodb_open_files = 400
+innodb_io_capacity = 400
+innodb_flush_method = O_DIRECT
 character-set-server = utf8mb4
 collation-server = utf8mb4_general_ci
 transaction_isolation = READ-COMMITTED
 binlog_format = ROW
-innodb_large_prefix=on
-innodb_file_format=barracuda
-innodb_file_per_table=1
+
+[mysqldump]
+quick
+quote-names
+max_allowed_packet = 16M
+
+[mysql]
+#no-auto-rehash    # faster start of mysql but no tab completion
+
+[isamchk]
+key_buffer = 16M
+
+!include /etc/mysql/mariadb.cnf
+!includedir /etc/mysql/conf.d/
 EOF
+/usr/sbin/service mysql restart
 clear
 echo "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"
 echo "The Nextcloud-DB username and password - Attention: password is case-sensitive:"