Question

I would like to print $1 and $2 if $2<25from text files. I also need to get the total number of students with marks less than 25 from all files. How can I do this with awk or sed?

students  marks
jerry     12
peter     35
john      5
jerry     15
john      10

Desired output

jerry    12
john      5 
jerry     15
john      10

Total no:of students :- 4

Answer 1

In awk:

$ awk '$2<25 {print; i++} END{print "\nTotal number of students:- "i}' file

Output:

jerry     12
john      5
jerry     15
john      10

Total number of students:- 4

If you want the output sorted by grade (lowest to highest):

$ sort -n -k2,2 file | awk '$2<25 {print; i++} END{print "\nTotal number of students:- "i}' 

Sorted Output:

john      5
john      10
jerry     12
jerry     15

Total number of students:- 4

-n numerical sort;
-k2,2 sort on the second field.