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linux man page : cat - 파일의 내용을 읽어서 표준출력한다.

 Recommanded Free YOUTUBE Lecture: Learning and Hacking VPC

사용법 

cat [OPTION] [FILE] ...
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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설명

주어진 파일들의 리스트를 읽어서 표준출력(:12)한다. 혹은 표준입력을 받아서 출력한다.

  • -A, --show-all
-vET 와 동일하다.
  • -b, numbernonblank
줄번호를 표시해서 출력한다. 이때 공백줄에는 줄번호가 붙지 않는다.
  • -e
-vE와 동일하다.
  • -E, --show-ends
각 줄의 마지막에 $를 붙인다.
  • -n, --number
공백줄을 포함한 모든 줄에 줄번호를 표시한다.
  • -s, --squeeze-blank
여러줄의 공백을 하나로 출력한다.
  • -t
-vT 와 동일하다.
  • -T, --show-tabs
탭문자를 ^I 문자로 보여준다.

사용예

joinc를 포함한 라인을 출력한다. 
cat test.txt | grep joinc
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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test1.txt test2.txt 를 출력한다. test1.txt 내용을 모두 출력한다음 test2.txt 내용을 출력한다. 
cat test1.txt test2.txt
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Joinc proposes educational computer-engineering contents. Especially, the contents focus on recently popular and meaningful topics, technically helpful for those who already work or to-be developers in the computer industry and theoretical or typical topics covered in undergraduate courses.

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