rkhunter检测到问题。

风化狼

/var/log/rkhunter.log中有几个warning如下：

[14:35:01] Warning: Checking for possible rootkit strings    [ Warning ]
[14:35:01]          Found string 'hdparm' in file '/etc/init.d/hdparm'. Possible rootkit: Xzibit Rootkit
[14:35:01]          Found string 'hdparm' in file '/etc/init.d/.depend.boot'. Possible rootkit: Xzibit Rootkit

[14:35:17]   Checking for hidden files and directories       [ Warning ]
[14:35:17] Warning: Hidden directory found: /etc/.java
[14:35:17] Warning: Hidden directory found: /dev/.udev
[14:35:17] Warning: Hidden directory found: /dev/.initramfs

水平比较菜，请问这几个warning要紧吗？是不是我系统中了木马？