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picoCTF 2019 writeup First Grep

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First Grep (General Skills)

Can you find the flag in file? This would be really tedious to look through manually, something tells me there is a better way.

添付ファイル
・file

タイトルより、grepを使いたくなるほど大量の文字が並んでいると推測できる。

$ file file
file: ASCII text, with very long lines (4200)

stringsとgrepでフラグを探す。

$ strings file | grep pico
picoCTF{grep_is_good_to_find_things_f77e0797}

フラグが得られた。

picoCTF{grep_is_good_to_find_things_f77e0797}

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