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Create a private key for the client and a public key for the server to allow login with key pair authentication 1.key pair creation Create a public/private key pair for a user connecting to the Linux server using OpenSSH. Use ssh-keygen to create key pairs. Creation of public/private key pairs is performed with remote login user privileges. If you do not specify the creation destination and file name, id_ecdsa and id_ecdsa.pub will be created in /home/(user name)/.ssh/. On the way, also enter the password for the key.

1. MariaDB Install Update the server package 1.2 phpMyAdmin Install Installed phpMyAdmin and configured it to operate MariaDB via web browser 2. Wordpress Install 2.1 Required library installation

1. Server Backup 1.1 Backup under /srv/www/ ①Create backup script file 1.2. MariaDB Database Backup ①Create backup script file 2.1 Restore backup files under www ① Save backup files used for restore to the "/ (root)" directory of the server 2.2 Restore MariaDB data ① Save the database backup file to any directory Extract data

1. Tripwire Tripwire is a host-based intrusion detection system (IDS) that monitors files and directories and notifies you when changes are made. 1.1 Install and configuration ① install 2. chkrootkit インストール Install a rootkit detection tool called chkrootkit to check whether a rootkit has been installed on the Linux server. ①chkrootkit download,install 3. Logwatch logwatch is a software program that automatically analyzes logs and reports the results to support operations.

Create a private key for the client and a public key for the server to allow login with key pair authentication 1.key pair creation Create a public/private key pair for a user connecting to the Linux server using OpenSSH. Use ssh-keygen to create key pairs. Creation of public/private key pairs is performed with remote login user privileges. If you do not specify the creation destination and file name, id_ecdsa and id_ecdsa.pub will be created in /home/(user name)/.ssh/. On the way, also enter the password for the key.

1. clamav ( anti-virus software ) 1.1 Clamav install 2.  Mail server Install 2.1 Postfix install ①Install Postfix and build an SMTP server 3. Mail Server: Postfix + Clamav + Amavisd Set up Postfix and Clamav to work together to scan incoming and outgoing mail in real time. 4.virus scan script substitution Set up a notification to a specified e-mail address after virus check scan.