最贊回答 / 漸入佳境coder
awk?'ARGIND==1{A[$0]}?ARGIND>1&&!($0?in?A){print?$0}'?file1.txt?file2.txt ?
2017-10-20
ifconfig eth2 |sed -n '/inet /p'|sed 's/^.*r:\(.*\)B.*$/\1/'
2017-10-16