For my own notes.. if you are using grep to parse through the contents of a file and want to see the preceding or proceeding content than the line that matched your query, you can use the following options

preceding content

grep -B NUMBER_OF_LINES_TO_DISPLAY query filename

for example, if I was searching for kudithipudi in a file names access.log and want to see 2 lines prior to the match, I would use

grep -B 2 kudithipudi access.log

proceeding content

grep -A NUMBER_OF_LINES_TO_DISPLAY query filename

for example, if I was searching for kudithipudi in a file names access.log and want to see 2 lines after the match, I would use

grep -A 2 kudithipudi access.log

preceding and proceeding content

grep -C NUMBER_OF_LINES_TO_DISPLAY query filename

for example, if I was searching for kudithipudi in a file names access.log and want to see 2 lines before and after the match, I would use

grep -C 2 kudithipudi access.log