chattr +i /etc/rc.d/rc.local chattr +i /etc/profile chattr +i /etc/passwd chattr +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