木马防范
事前防范
sudo apt-get install fail2ban sudo service fail2ban start
事后防范
/var/spool/cron/* /etc/crontab /etc/cron.d/* /etc/cron.daily/* /etc/cron.hourly/* /etc/cron.monthly/* /etc/cron.weekly/ /etc/anacrontab /var/spool/anacron/*/root/.ssh/authorized_keys* /home/*/.ssh/authorized_keys
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