Let’s see how to search in files and show the lines before and after the coincidences. Very useful when searching in log files, for example.
How to search in files and show the lines before and after
Let’s see an easy example:
grep -C 30 'error' error.log
This script will output the 30 lines (15 before and 15 after) for each coincidence searching
error in the file
You can change the number of lines, the value to search and the file(s) to search in. Also, keep in mind can use commodins:
grep -C 2 '*@gmail.com' *.log
This script will output the 2 lines (1 before and 1 after) for any coincidence ending with
@gmail.com in any
Feel free to leave a comment with your doubts or experiences.