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tee, nl
tee -a 파일에 추가
nl == cat -b
-i10 -v100 -w10
increment
v 시작
width
https://en.m.wikipedia.org/wiki/Tee_(command)
tee (command) - Wikipedia
The command is available for Unix and Unix-like operating systems, Microware OS-9,[3] DOS (e.g. 4DOS, FreeDOS), Microsoft Windows (e.g. 4NT, Windows PowerShell), and ReactOS.[4] The Linux tee command was written by Mike Parker, Richard Stallman, and David
en.m.wikipedia.org
