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1. System Backup1.1 Backup under /var/www/html①　Create backu...

1. SSH Service Security SettingsThe SSH service allows the r...

Create public and private key pairsCreate a public/private k...

1. Install NTP serverSetting ReflectionOperation check2. Ins...

Web server Apache2 installationAllow http:80 port in UFW bef...

1. Antivirus software Clamav installedInstall Clam AntiVirus...

1. MariaDB1.1 InstallMariaDB version confirmation1.2 MariaDB...

1. System Backup1.1 Backup under /var/www/html①　Create backup_all.sh script under /opt/script1.2 MariaDB database backup①Create db_backup.sh script under /opt/script# vi /opt/script/db_backup.shdb_backup.sh script contents2. System Restore2.1 Restore backup files under HTML① Store HTML backup files used for backup in the "/ (root)" directorySelect the backup file with the latest timestamp (e.g. www_back_20220501.tar.gz)2.2 Restore MariaDB database①Save DB backup file to any directory and extract data# cd /var/www/backup/db_bak

1. Install a time synchronization service NTP server# apt -y install chrony# vi /etc/chrony/chrony.conf# Lines 20-23.：Comment the default settings and add the NTP server for your time zone.#pool ntp.ubuntu.com     iburst maxsources 4#pool 0.ubuntu.pool.ntp.org iburst maxsources 1#pool 1.ubuntu.pool.ntp.org iburst maxsources 1#pool 2.ubuntu.pool.ntp.org iburst maxsources 2