백도어 있습니까?

완전히 쌩 초짜입니다

전혀 리눅스도 모르는데 책보면서 배우는 중입니다

책에 나온데로 백도어 검색은 했는데 이게 백도어 인지 아닌지를 모르기에 도움 요청 합니다

아래 부분에서 백도어가 있나요? 있으면 어떻게 지우나요? ^^ 너무 무식한 질문에  죄송 합니다 ^^;;

-- 1 root root 5 Oct  1  2006 /dev/.static/dev/.udev/uevent_seqnum
-rw-r--r-- 1 root root 0 Mar 18 04:26 /dev/.udev/failed/devices@platform@serial8250
-rw-r--r-- 1 root root 0 Mar 18 04:26 /dev/.udev/failed/devices@pnp0@00:00
-rw-r--r-- 1 root root 0 Mar 18 04:26 /dev/.udev/failed/devices@platform@eisa.0
-rw-r--r-- 1 root root 0 Mar 18 04:26 /dev/.udev/failed/devices@pci0000:00@0000:00:10.0
-rw-r--r-- 1 root root 0 Mar 18 04:26 /dev/.udev/failed/devices@pci0000:00@0000:00:11.0
-rw-r--r-- 1 root root 0 Mar 18 04:26 /dev/.udev/failed/devices@platform@pcspkr
-rw-r--r-- 1 root root 0 Mar 18 04:26 /dev/.udev/failed/devices@pci0000:00@0000:00:13.0
-rw-r--r-- 1 root root 0 Mar 18 04:26 /dev/.udev/failed/devices@pnp0@00:0b
-rw-r--r-- 1 root root 0 Mar 18 04:26 /dev/.udev/failed/devices@pnp0@00:04
-rw-r--r-- 1 root root 0 Mar 18 04:26 /dev/.udev/failed/devices@pci0000:00@0000:00:15.0
-rw-r--r-- 1 root root 0 Mar 18 04:26 /dev/.udev/failed/devices@pci0000:00@0000:00:10.2
-rw-r--r-- 1 root root 0 Mar 18 04:26 /dev/.udev/failed/devices@pci0000:00@0000:00:1f.0
-rw-r--r-- 1 root root 0 Mar 18 04:26 /dev/.udev/failed/devices@pci0000:00@0000:00:1e.0
-rw-r--r-- 1 root root 0 Mar 18 04:26 /dev/.udev/failed/devices@pnp0@00:02
-rw-r--r-- 1 root root 0 Mar 18 04:26 /dev/.udev/failed/devices@pci0000:00@0000:00:00.0
-rw-r--r-- 1 root root 0 Mar 18 04:26 /dev/.udev/failed/devices@pnp0@00:0c
-rw-r--r-- 1 root root 0 Mar 18 04:26 /dev/.udev/failed/class@scsi_device@2:0:0:0
-rw-r--r-- 1 root root 0 Mar 18 04:26 /dev/.udev/failed/devices@pci0000:00@0000:00:16.0
-rw-r--r-- 1 root root 0 Mar 18 04:26 /dev/.udev/failed/devices@pci0000:00@0000:00:10.1
-rw-r--r-- 1 root root 0 Mar 18 04:26 /dev/.udev/failed/devices@pnp0@00:03
-rw-r--r-- 1 root root 0 Mar 18 04:26 /dev/.udev/failed/devices@pnp0@00:05
-rw-r--r-- 1 root root 141 Mar 18 04:26 /dev/.udev/db/class@input@input0@event0
-rw-r--r-- 1 root root 92 Mar 18 04:26 /dev/.udev/db/class@input@input1@ts0
-rw-r--r-- 1 root root 145 Mar 18 04:26 /dev/.udev/db/class@input@input1@event1
-rw-r--r-- 1 root root 610 Mar 18 04:26 /dev/.udev/db/block@sda@sda2
-rw-r--r-- 1 root root 617 Mar 18 04:26 /dev/.udev/db/block@sda@sda3
-rw-r--r-- 1 root root 617 Mar 18 04:26 /dev/.udev/db/block@sda@sda1
-rw-r--r-- 1 root root 398 Mar 18 04:26 /dev/.udev/db/block@sda
-rw-r--r-- 1 root root 46 Mar 18 04:26 /dev/.udev/db/class@usb_device@usbdev4.1
-rw-r--r-- 1 root root 46 Mar 18 04:26 /dev/.udev/db/class@usb_device@usbdev2.1
-rw-r--r-- 1 root root 46 Mar 18 04:26 /dev/.udev/db/class@usb_device@usbdev5.1
-rw-r--r-- 1 root root 46 Mar 18 04:26 /dev/.udev/db/class@usb_device@usbdev3.1
-rw-r--r-- 1 root root 44 Mar 18 04:26 /dev/.udev/db/class@usb_device@usbdev1.1
-rw-r--r-- 1 root root 139 Mar 18 04:26 /dev/.udev/db/class@input@input1@mouse0
-rw-r--r-- 1 root root 42 Mar 18 04:26 /dev/.udev/db/class@input@mice
-rw-r--r-- 1 root root 5 Mar 19 01:00 /dev/.udev/uevent_seqnum
-rw-r--r-- 1 root root 17 Mar 18 04:26 /dev/.initramfs/progress_state
-rw-r--r-- 1 root root 0 Mar 18 04:25 /dev/.initramfs-tools