找出两个txt中不同的行
comm -3 <(sort a.txt) <(sort b.txt)
sort a.txt b.txt | uniq -u
grep -wvf a.txt b.txt
diff -a a.txt b.txt | grep ">" | sed 's/> //'
diff a.txt b.txt | awk '{if($0~/^[<>]/)print substr($0, 3)}'
comm -3 <(sort a.txt) <(sort b.txt)
sort a.txt b.txt | uniq -u
grep -wvf a.txt b.txt
diff -a a.txt b.txt | grep ">" | sed 's/> //'
diff a.txt b.txt | awk '{if($0~/^[<>]/)print substr($0, 3)}'