玩法就是根据给出的提示和特征运用shell命令找口令文件，网址在这里 → OverTheWire: Bandit
Level 1
cat readme
boJ9jbbUNNfktd78OOpsqOltutMc3MY1
Level 2
cat ./-
CV1DtqXWVFXTvM2F0k09SHz0YwRINYA9
https://overthewire.org/wargames/bandit/bandit2.html
Level 3
cat "spaces in this filename" UmHadQclWmgdLOKQ3YNgjWxGoRMb5luK
Level 4
cd inhere/ cat .hidden pIwrPrtPN36QITSp3EQaw936yaFoFgAB
Level 5
找出人类可读文件
cd inhere/ cat ./-file07 koReBOKuIDDepwhWk7jZC0RTdopnAYKh
file命令判断文件类型，ASCII text
Level 6
找下面特征文件
- human-readable
- 1033 bytes in size
- not executable
find . -type f -size 1033c ./inhere/maybehere07/.file2 cat ./inhere/maybehere07/.file2 DXjZPULLxYr17uwoI01bNLQbtFemEgo7
Level 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 / -type f -size 33c -user bandit7 -group bandit6 cat /var/lib/dpkg/info/bandit7.password HKBPTKQnIay4Fw76bEy8PVxKEDQRKTzs
Level 8
cat data.txt |grep "millionth" millionth cvX2JJa4CFALtqS87jk27qwqGhBM9plV
Level 9
The password for the next level is stored in the file data.txt and is the only line of text that occurs only once
data.txt中有大量随意排列和重复的随机字符串↓
用sort按头字母排序后，用uniq -u选出唯一一行的
cat data.txt |sort |uniq -u UsvVyFSfZZWbi6wgC7dAFyFuR6jQQUhR
官方给出的帮助文档↓
Learn Piping and Redirection - Linux Tutorial
Level 10
The password for the next level is stored in the file data.txt in one of the few human-readable strings, preceded by several ‘=’ characters.
根据提示人类可读和有=，想到之前打CTF时用过的命令strings选出可读字符串并grep出有==号的
strings data.txt |grep "==" ========== the*2i"4 ========== password Z)========== is &========== truKLdjsbJ5g7yyJ2X2R0o3a5HQJFuLk
Level 11
The password for the next level is stored in the file data.txt, which contains base64 encoded data
cat data.txt VGhlIHBhc3N3b3JkIGlzIElGdWt3S0dzRlc4TU9xM0lSRnFyeEUxaHhUTkViVVBSCg==
The password is IFukwKGsFW8MOq3IRFqrxE1hxTNEbUPR
Level 12
The password for the next level is stored in the file data.txt, where all lowercase (a-z) and uppercase (A-Z) letters have been rotated by 13 positions
cat data.txt Gur cnffjbeq vf 5Gr8L4qetPEsPk8htqjhRK8XSP6x2RHh
看到一串乱码，页面后面有个提示链接
Helpful Reading Material
了解了ROT13算法，有点类似古典密码的凯撒密码
ROT13在线解码计算器 ← 这里可以解！！
此题看到还有其他解法，用tr命令转换
按照这里对应替换
cat 1| tr a-mn-zA-MN-Z n-za-mN-ZA-M The password is 5Te8Y4drgCRfCx8ugdwuEX8KFC6k2EUu #可以用下面更简单的格式 cat 1| tr a-zA-Z n-za-mN-ZA-M The password is 5Te8Y4drgCRfCx8ugdwuEX8KFC6k2EUu
参考：
tr命令_东城绝神-CSDN博客_tr命令 （tr可以替换、删除、压缩）
用python codecs库
>>> a = "Gur cnffjbeq vf 5Gr8L4qetPEsPk8htqjhRK8XSP6x2RHh" >>> import codecs >>> a = "Gur cnffjbeq vf 5Gr8L4qetPEsPk8htqjhRK8XSP6x2RHh" >>> print(codecs.encode(a, 'rot13')) The password is 5Te8Y4drgCRfCx8ugdwuEX8KFC6k2EUu
Level 13
The password for the next level is stored in the file data.txt, which is a hexdump of a file that has been repeatedly compressed. For this level it may be useful to create a directory under /tmp in which you can work using mkdir. For example: mkdir /tmp/myname123. Then copy the datafile using cp, and rename it using mv (read the manpages!)
cat data.txt
data.txt是个hex文件，也叫hex dump文件
用于提权的Linux命令，即“xxd” | 《Linux就该这么学》
mkdir /tmp/z cp ~/data.txt /tmp/z cd /tmp/z xxd -r data.txt data mv data data.gz gzip -d data.gz mv data data.bz2 bzip2 -d data.bz2 mv data data.gz gzip -d data.gz mv data data.tar tar -xvf data.tar mv data5.bin data.tar tar -xvf data.tar mv data6.bin a.bz2 bzip2 -d a.bz2 mv a a.tar tar -xvf a.tar mv data8.bin b.gz gzip -d b.gz cat b The password is 8ZjyCRiBWFYkneahHwxCv3wb2a1ORpYL
Level 14
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Level 18
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Level 21
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Level 30
Level 31
Level 32
Level 33
参考: