diff

• vimdiff
• sdiff
• diff : colordiff 명령도 있음
• Diff So Fancy

• https://github.com/so-fancy/diff-so-fancy
• https://github.com/dandavison/delta

• 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>

# 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=""

• comm
• grep
• awk
• join