linux 中awk命令同时多多个文件指定分隔符

[root@pc1 test01]# ls
a.txt  b.txt
[root@pc1 test01]# cat a.txt
A:10
B:5
C:12
[root@pc1 test01]# cat b.txt
100 A
50 B
42 C
[root@pc1 test01]# awk '{if(NR == FNR) {print $2} else {print $1}}' FS=":" a.txt FS=" " b.txt
10
5
12
100
50
42

[root@pc1 test01]# ls
a.txt  b.txt
[root@pc1 test01]# cat a.txt
A:10
B:5
C:12
[root@pc1 test01]# cat b.txt
100 A
50 B
42 C
[root@pc1 test01]# awk '{if(NR == FNR) {FS = ":"; print $2} else {FS = " "; print $1}}' a.txt  b.txt

5
12
100 A
50
42