Overthewire-Bandit Level 7 - Grep

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Ref:

• Overthewire-Bandit7

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Bandit Level 7

Level Goal The password for the next level is stored in the file data.txt next to the word millionth

Commands you may need to solve this level man, grep, sort, uniq, strings, base64, tr, tar, gzip, bzip2, xxd

#

SSH

ssh bandit7@bandit.labs.overthewire.org -p 2220
morbNTDkSW6jIlUc0ymOdMaLnOlFVAaj

Grep

To extract only the word next to it: Commands:

grep millionth data.txt | awk '{print $2}'

grep millionth data.txt

• data.txt contains many words, one per line
• The password is on the same line as the word millionth
• grep prints that entire line

Command:

bandit7@bandit:~$ 
grep millionth data.txt

Output:

millionth       dfwvzFQi4mU0wfNbFOe9RoWskMLg7eEc

Sort

Sort and then search

sort data.txt | grep millionth

Uniq

uniq — remove duplicates (needs sort)

sort data.txt | uniq | grep millionth

Strings

strings — extract printable text

strings data.txt | grep millionth

base64

base64 — decode before searching

base64 -d data.txt | grep millionth

Output:

base64: invalid input

✅ ASCII text → do NOT use base64 ✅ Base64 ASCII text → YES, decode

tar

tar — extract then search If data.txt were inside an archive:

tar -xf archive.targrep millionth data.txt

Or directly:

tar -Oxf archive.tar data.txt | grep millionth

gzip

gzip — search compressed file

If data.txt.gz exists:

gzip -dc data.txt.gz | grep millionth

zgrep millionth data.txt.gz

bzip2

bzip2 — search bzip2-compressed file

bzip2 -dc data.txt.bz2 | grep millionth

bzgrep millionth data.txt.bz2

xxd — hex view → convert back → search

xxd data.txt | xxd -r | grep millionth