shell如何打印 两文件第一列重复的整行

REFRESHMM

cat a
1 qwe
2 asd
3 jjjkk

cat b
1 q
2 a

要求打印行
1 qwe
2 asd
1 q
2 a

zxy877298415

回复 1# REFRESHMM

1. awk 'FNR==NR{a[$1]=$0;next}a[$1]{print $0}END{for(i in a) print a[i]}' b a

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REFRESHMM

awk 'NR==FNR{a[$1]=$0;next}NR>FNR{if($1 in a)print $0"\n"a[$1]}' b a  这个结果排序乱了 也可

sunlove521

awk 'NR==3{next}{print FNR,$0}' a b
1 qwe
2 asd
1 q
2 a

sunlove521

# awk 'NR==3{next}{print FNR,$0}' a b
1 qwe
2 asd
1 q
2 a

sunlove521

awk 'NR==3{next}{print FNR,$0}' a b
1 qwe
2 asd
1 q
2 a

sunlove521

awk 'NR==3{next}1' a b
1 qwe
2 asd
1 q
2 a
刚才看错了

wh7211

回复 1# REFRESHMM

1. awk 'FILENAME==ARGV[1]{a[$1]=$0;next}a[$1]{b=b?b"\n"a[$1]:a[$1];c=c?c"\n"$0:$0}END{print b"\n"c}' a b

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