1.FS 输入字段分隔符，默认是空格
[root@VM-4-13-centos awk]# cat ip.txt
10.10.49.100 192.1.1.1
10.10.49.101 192.2.2.2
10.10.49.100 192.3.3.3
10.10.49.102 192.4.4.4
10.10.49.101 192.5.5.5
10.12.49.100 192.6.6.6
[root@VM-4-13-centos awk]# cat ip.txt | awk 'BEGIN{FS="."}{print $1,$2,$3}'
10 10 49
10 10 49
10 10 49
10 10 49
10 10 49
10 12 49
2.OFS 输出行分隔符，默认为换行符
[root@VM-4-13-centos awk]# cat ip.txt | awk 'BEGIN{FS=".";OFS="###"}{print $1,$2,$3}'
10###10###49
10###10###49
10###10###49
10###10###49
10###10###49
10###12###49
标签：10,FS,49,OFS,awk,10.10,### From： https://www.cnblogs.com/joyware/p/17118578.html