grep get lines before and after code example

Example 1: lines before and after grep

You can use the -B and -A to print lines before and after the match.

grep -i -B 10 'error' data
Will print the 10 lines before the match, including the matching line itself.

Example 2: grep 10 line before

Include -A flag to add lines after match and -B flag to add lines before
grep match -A 3	#display match line and 3 after lines
grep match -B 2 #display match line and 2 lines before