UNIX for Dummies Questions & Answers

a
b
c
d

col1	col2	col3
1	a/e	aa
2	b/e	aa
3	z/y	aa
4	t/u	bb
5	d/f	aa
6	a/t	aa

col1	col2	col3
1	a/e	aa
2	b/e	aa
5	d/f	aa
6	a/t	aa

awk  'NR==FNR{a[$1];next}{ for(i=1;i<=length(a);i++) if (($2~a[i]) || (NR==1) ){ print }}' list data

cat $list|awk '{print $2}'|grep $value

col1    col2    col3
col1    col2    col3
col1    col2    col3
......

awk  '
NR==FNR         {a[$1]
                 next
                }
FNR==1
                {split ($2, T, "/")}
T[1] in a
' file1 file2
col1    col2    col3
1    a/e    aa
2    b/e    aa
5    d/f    aa
6    a/t    aa