Grep for a word, and if found print 10 lines before and 10 lines after the pattern match

Question

I am processing a huge file. I want to search for a word in the line and when found I should print 10 lines before and 10 lines after the pattern match. How can I do it in P

Answer 1

Use grep with -C option, easiest solution:

grep -C 10 'what_to_search' file.txt