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2. Vsftpd over SSL/TLSLS 2.1 Create self-signed certificates This work is not required if you are using a trusted, legitimate certificate such as Let's Encrypt. 3. File server installation with Samba Build a file server with access rights that requires user authentication with Samba. Installation Procedure ①Create shared folders with access rights that require user authentication ②Accessible group creation ③Creation of users belonging to accessible groups ④Configuration File Editing

SSH public key cipher setting 1.Create a key pair Create a public/private key pair for a user connecting to a Linux server using OpenSSH. Use ssh-keygen to create the key pair. The creation of a public/private key pair must be done as a user with remote login privileges. If you do not specify the destination and file name, id_ed25519 and id_ed25519.pub will be created in /home/(user name)/.ssh/. On the way, enter the password for the key.

MiracleLinux MIRACLE LINUX is a Japanese Linux distribution provided by Cybertrust Corporation. Development was started by Miracle Linux (now Cybertrust), a company established by Oracle Japan and NEC in June 2000 to ensure stable operation of the Oracle Database for business to enterprise use. It has been built as a RHEL base since Version 2.0 released in May 2001, and as a complete RHEL clone since Version 6.0 released in January 2012. The latest version is 8.8, released on October 05, 2023, but can be installed just like 8.4. MIRACLE LINUX, a well-known domestic RHEL clone, was initially a commercial OS with a paid license, but following the demise of CnetOS8, it was announced that it would be offered free of charge starting with the latest 8.4 version. Therefore, this OS is currently in the limelight as a candidate for migration from CentOS8.

1. Disable SELinux First, disable selinux. selinux is a feature that improves auditing and security in Linux, but when enabled, it places considerable restrictions on the behavior of services and on what can be configured. Therefore, it is basically disabled in many cases. If you build a server while browsing a website and it does not work as expected, it may be due to the fact that selinux is enabled. Therefore, do not forget to disable it after installation. You can disable it by doing the following

1.Setting up a remote connection via SSH SSH is a service for connecting remotely to a server and is basically running immediately after the OS is installed, but the default settings are somewhat insecure. Here we will configure the default settings to increase the security of ssh connections. 1.1 SSH service configuration file changes Modify the configuration file to change the SSH service settings. The SSH service configuration file is "/etc/ssh/sshd_config".

1.Apache2 Install , Virtual Host Configuration 1.1 Apache2 install 2. Use of CGI Scripts ①CGI availability check 3. PHP installation and configuration 4. Digest authentication with Apache2 Since Basic Authentication, a well-known authentication authorization method for http, sends authentication information in plain text, there is a risk of ID and password leakage if the packet is intercepted. On the other hand, Digest Authentication encrypts and transmits authentication information, so there is almost no risk of information leakage.

1.SSL Certificate Acquisition ( Let's Encrypt ) Install the latest open ssl # dnf install openssl-devel 1.1 advance preparation 1.Package management system Snappy installation Since the SSL certificate issuing tool "certbot" of Let's Encrypt is recommended to be installed using "snap" after 2021, install Snapd first.(Can also be installed the traditional way with dnf or yum) 2. Converting Apache to https Install the following # dnf -y install mod_ssl 3. SSL/TLS (Let's Encrypt) settings on the mail server 3.1 Obtaining a certificate for the mail server Obtain a certificate for the mail server, but it cannot be obtained in the same way as above, so the following with the "--standalone" option fails.

Mysql8 Install ＃ dnf -y install mysql-server Create a new charset.cnf with the following contents WordPress Install 1. Create database for Word Press As an example, assume database [wp_db] database user [wp_user] password [?W123456]

1.Website data backup 1-1.Backup under /var/www/html ①Create backup script file # cd /var/www/system # vi backup_html.sh 2.MySQL database backup ①Create backup script file # cd /var/www/system # vi db_my_backup.sh 3.Restore backup files under html ①Store HTML backup files in "/ (root)" directory 4.Restore Mysql backup file ①Save the database backup file to any directory and （In the example, the directory is "/var/www/backup/db_bak".）Extracting data