[OverTheWire] bandit 6 -> 7

The password for the next level is stored somewhere on the server and has all of the following properties:

• owned by user bandit7
• owned by group bandit6
• 33 bytes in size

find 명령어 여러개 사용해야할 때

find [옵션] [경로] [표현식] [옵션] [표현식] [옵션] [표현식]

이렇게 쭉 나열하시면 됩니다

 

find . -user bandit7 -group bandit6 -size 33c -exec ls -al {} \; 2>/dev/null

• find : 명령어
• . : 현재 경로
• -user: 옵션
• -group : 옵션
• -size: 옵션
• -exec: 해당 옵션 다음에 사용할 명령어를 실행시킬 옵션 (ls -al)
• {} : find로 찾은 각각의 파일에 대해 뒤에 오는 명령어를 실행하라는 뜻
• \;: -exec 명령의 끝을 의미(원래는 ;으로 끝내면 되는데 특수문자라 인식 못할까봐 앞에 \를 쓰는거임)

0 = 입력

1 = 출력

2 = 에러

/dev/null = 쓰레기통

=> 2>/dev/null = 에러값은 쓰레기통으로

 

bandit6@bandit:~$ ls
bandit6@bandit:~$ ls -a
.  ..  .bash_logout  .bashrc  .profile

bandit6@bandit:~$ cd /
bandit6@bandit:/$ find . -user bandit7 -group bandit6 -size 33c -exec ls -al {} \;
find: ‘./proc/tty/driver’: Permission denied
find: ‘./proc/1/task/1/fd’: Permission denied
find: ‘./proc/1/task/1/fdinfo’: Permission denied
find: ‘./proc/1/task/1/ns’: Permission denied
find: ‘./proc/1/fd’: Permission denied
find: ‘./proc/1/map_files’: Permission denied
find: ‘./proc/1/fdinfo’: Permission denied
find: ‘./proc/1/ns’: Permission denied
find: ‘./proc/2/task/2/fd’: Permission denied
find: ‘./proc/2/task/2/fdinfo’: Permission denied
find: ‘./proc/2/task/2/ns’: Permission denied
find: ‘./proc/2/fd’: Permission denied
find: ‘./proc/2/map_files’: Permission denied
find: ‘./proc/2/fdinfo’: Permission denied
find: ‘./proc/2/ns’: Permission denied
find: ‘./proc/27/task/27/fd/6’: No such file or directory
find: ‘./proc/27/task/27/fdinfo/6’: No such file or directory
find: ‘./proc/27/fd/5’: No such file or directory
find: ‘./proc/27/fdinfo/5’: No such file or directory
find: ‘./lost+found’: Permission denied
find: ‘./var/tmp’: Permission denied

.

.

.

bandit6@bandit:/$ find . -user bandit7 -group bandit6 -size 33c -exec ls -al {} \; 2>/dev/null
-rw-r----- 1 bandit7 bandit6 33 Oct 14 09:26 ./var/lib/dpkg/info/bandit7.password
bandit6@bandit:/$ cat ./var/lib/dpkg/info/bandit7.password
morbNTDkSW6jIlUc0ymOdMaLnOlFVAaj