UNIX for Advanced & Expert Users

PHC111
PHC113

PHC111
a
b
PHC112
a
PHC113
b
c
PHC114
d
e
PHC115

PHC111
a
b
PHC113
b
c

while read pat
do
count=2
while read line
do
b=`echo $line|grep PHC`
if [ $? -eq 0 ]
then
if [ $count -eq 1 ]
then
break;
break;
fi
a=`echo $line|grep $pat`
if [ $? -eq 0 ]
then
count=`echo "$count-1"|bc`
fi
fi
if [ $count -eq 1 ]
then
echo $line
fi
done<mint.txt
done<pattern.txt

while read line;do egrep -A2 $line file2;done < file1

PHC111
a
b
PHC113
b
c

awk 'FNR==NR {a[$1];next} $1 in a {print;getline;print;getline;print}' file1 file2

PHC111
a
b
PHC113
b
c