2. ขั้นตอนการติดตั้งและตั้งค่า mariadb , Postfix , Dovecot

1. ติดตั้ง mariadb , Postfix , Dovecot และ Packet ที่จำเป็นกับ Server

# yum install postfix dovecot mariadb-server dovecot-mysql postfix-mysql

2. สั่ง start service ของ postfix , dovecot , mariadb ทุกครั้งที่เปิด Server

# systemctl start postfix
# systemctl start dovecot
# systemctl start mariadb
# systemctl enable postfix
# systemctl enable dovecot
# systemctl enable mariadb

3. ดูสถานะการทำงานของ postfix , dovecot , maridb

# systemctl status postfix
# systemctl status dovecot
# systemctl status mariadb

4. ตั้งค่า UTF8 ให้กับ mysql เพื่อให้รองรับภาษาไทย โดยเพิ่มคำสั่งด้าล่างลงใน /etc/my.cnf.d/maridb-server.cnf ใต้ [mysqld]

# vi /etc/my.cnf.d/mariadb-server.cnf

#
# These groups are read by MariaDB server.
# Use it for options that only the server (but not clients) should see
#
# See the examples of server my.cnf files in /usr/share/mysql/
#

# this is read by the standalone daemon and embedded servers
[server]

# this is only for the mysqld standalone daemon
# Settings user and group are ignored when systemd is used.
# If you need to run mysqld under a different user or group,
# customize your systemd unit file for mysqld/mariadb according to the
# instructions in http://fedoraproject.org/wiki/Systemd
[mysqld]
character-set-server = utf8
collation-server = utf8_general_ci
skip-character-set-client-handshake
bind-address=127.0.0.1
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
log-error=/var/log/mariadb/mariadb.log
pid-file=/run/mariadb/mariadb.pid

#
# * Galera-related settings
#
[galera]
# Mandatory settings
#wsrep_on=ON
#wsrep_provider=
#wsrep_cluster_address=
#binlog_format=row
#default_storage_engine=InnoDB
#innodb_autoinc_lock_mode=2
#
# Allow server to accept connections on all interfaces.
#
#bind-address=0.0.0.0
#
# Optional setting
#wsrep_slave_threads=1
#innodb_flush_log_at_trx_commit=0 

# this is only for embedded server
[embedded]

# This group is only read by MariaDB servers, not by MySQL.
# If you use the same .cnf file for MySQL and MariaDB,
# you can put MariaDB-only options here
[mariadb]

# This group is only read by MariaDB-10.3 servers.
# If you use the same .cnf file for MariaDB of different versions,
# use this group for options that older servers don't understand
[mariadb-10.3]