chattr +i /etc/rc.d/rc.local
chattr +i /etc/profile
chattr +i /etc/passwdchattr +i /etc/shadow
chattr +i /etc/group
chattr +i /etc/groupshadow
chattr +i /etc/sysconfig/iptables
chattr +i /etc/fstab
chattr +i /etc/ssh/sshd_config
chattr +i /etc/crontab
chattr +i /var/spool/cron/root
chattr +i /root/.ssh/authorized_keys
chattr +i /root/.ssh/id_dsa
chattr +i /root/.ssh/id_dsa.pub
#部分重要文件可以添加进来
原文：https://www.cnblogs.com/bretzhao/p/11821536.html
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