sh script that produces the results you need.
#/bin/sh cat patterns.txt | while read -r pattern do grep -e "$pattern" found.txt if [ $? -eq 1 ] then echo "$pattern" not found fi done
In this script, I assume you output the results of your
grep to the file
found.txt, and that you store your patterns in the file
As you can see, the
grep in the loop will produce the same contents of the file
found.txt while adding
"$pattern" not found for the missing ones.