001、
[b20223040323@admin1 test]$ ls
a.txt
[b20223040323@admin1 test]$ cat a.txt ## 测试数据
d_j j k
d d_kk
[b20223040323@admin1 test]$ cat a.txt | while read {i,j}; do echo $j; done ## 默认是以空格或者tab键分割的
j k
d_kk
[b20223040323@admin1 test]$ cat a.txt
d_j j k
d d_kk
[b20223040323@admin1 test]$ cat a.txt | while IFS="_" read {i,j}; do echo $j; done ## 利用IFS选项指定分割符
j j k
kk
标签：IFS,read,admin1,b20223040323,linux,test,txt From： https://www.cnblogs.com/liujiaxin2018/p/17128705.html