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sudo apt update
sudo apt upgrade

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sudo service --status-all

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sudo service apache2 stop

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sudo ufw status
sudo ufw enable

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sudo ufw allow ssh
sudo ufw allow http

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sudo ufw enable

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sudo openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout /etc/ssl/private/example.key -out /etc/ssl/certs/example.crt

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sudo nano /etc/ssh/sshd_config

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PasswordAuthentication no // ½ûÓÃÃÜÂëÉí·ÝÑéÖ¤£¬Ê¹ÓÃÃÜÔ¿µÇ¼
Port [custom port] // ʹÓÃ×Ô½ç˵¶Ë¿ÚºÅ
Protocol 2 // ʹÓÃSSHЭÒé°æ±¾2

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sudo service ssh restart

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sudo rsync -av --exclude=/path/to/excluded/folder /path/to/source/folder /path/to/backup/folder

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