Ubuntu18.04_en

Download the installation imageThe installation media for Ubuntu Server can be downloaded from the official website on the Internet.You will need to create an installation CD/DVD from the downloaded iso file.The download location for the iso file isUbuntu official download siteInstallChange the BIOS so that the PC can boot from the installation disk created above, and then boot the PC.

Installing MySQL1.Install the necessary packages.# apt update# apt install mysql-server2.Configure security settings for MySQL server.There is a tool called mysql_secure_installtion that can be used to configure security-related settings for the MySQL server.When you run it, it will ask you a series of questions to help you configure some security settings.

1. Apache2 : SSL/TLS ConfigurationDescribes how to apply an SSL certificate obtained with Let's Encrypt to apache.Domain name : hoge.com1.1 Configuration of Apache2①Editing the Apache2 configuration fileRename and copy the default conf file (e.g. "hoge.com-ssl.conf")

1.Postfix : Installation / ConfigurationPostfix is a software developed as an MTA (Mail Transport Agent) to replace Sendmail, and is a mail server with features such as high compatibility with Sendmail, security, easy maintenance, and speed.Also, since Postfix only functions as an SMTP server for sending mails, you will need to install a POP server for receiving mails separately as described later.

1. WEB server installation1. 1 Apache2 installation① Install# apt -y install apache2② Edit configuration file# vi /etc/apache2/conf-enabled/security.conf# Line 25: ChangeServerTokens 　Prod

1.Install the FTP server vsftpd① Install# apt install vsftpd② Allow PORT21 to be used by FTP in UFW(firewall)# ufw allow ftp# ufw reload③ Edit the configuration file (vsftpd.conf)

1. Set the root password and use the SU command$  passwd rootpassword for ← Current user's passwordEnter new UNIX password: ← Enter the root password to be set.Retype new UNIX password: ← Re-enter the same passwordpasswd: password updated successfully

Obtaining a certificate with Let's Encrypt①Enable mod_ssl# a2enmod ssl②Install Git.# apt-get install -y git③Install the certificate acquisition tool# cd /usr/local/# git clone https://github.com/certbot/certbot