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[shell] ƯÁ¤ ¶óÀο¡ ¹®ÀÚ¿ Ãß°¡Çϱâ
1. ƯÁ¤¶óÀÎ(2¹ø°)¿¡ Ãß°¡ÇÑ ³»¿ë Ãâ·ÂÇϱâ
sed -e '2 i\Ãß°¡ÇÒ ¹®ÀÚ¿' file.txt
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perl -pe '$.==2 and print "Ãß°¡ÇÒ ¹®ÀÚ¿\n"' file.txt
2. ƯÁ¤¶óÀÎ(2¹ø°)¿¡ °ð¹Ù·Î Ãß°¡Çϱâ
perl -p -i -e '$.==2 and print "Ãß°¡ÇÒ ¹®ÀÚ¿\n"' file.txt
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