====== diff ======
  * [[vim:vimdiff|vimdiff]]
  * [[http://linux.about.com/library/cmd/blcmdl1_sdiff.htm|sdiff]]
  * [[http://linux.about.com/library/cmd/blcmdl1_diff.htm|diff]] : colordiff 명령도 있음
  * [[https://github.com/so-fancy/diff-so-fancy?ref=stackshare|Diff So Fancy]]

===== 더 좋은 diff =====
  * https://github.com/so-fancy/diff-so-fancy
  * https://github.com/dandavison/delta

===== 파일 내용을 비교하여 중복건은 제외하고 출력하기 =====
  * [[https://stackoverflow.com/questions/4366533/how-to-remove-the-lines-which-appear-on-file-b-from-another-file-a|linux - How to remove the lines which appear on file B from another file A? - Stack Overflow]]
  * 하나의 파일에 여러 내용이 있고, 거기서 제외시킬 내용을 한 줄마다 가진 파일이 있다고 할때, ''<origin>'', ''<lines-to-be-removed>''
<code sh>
# 정렬 된 파일일 경우
comm -23 <origin> <lines-to-be-removed> 

join -v <origin> <lines-to-be-removed> 

# 정렬 무관
grep -Fvxf <lines-to-be-removed> <origin>

awk 'NR==FNR{a[$0];next} !($0 in a)' <lines-to-be-removed> <origin>

comm -23 <(sort <origin>) <(sort <lines-to-be-removed>) 

join -v 1 <(sort <origin>) <(sort <lines-to-be-removed>)

diff <origin> <lines-to-be-removed> \
    --new-line-format="" --old-line-format="%L" --unchanged-line-format=""
</code>
  * [[linux:comm|comm]]
  * [[linux:grep|grep]]
  * [[linux:awk|awk]]
  * [[linux:join|join]]