Greping and showing some lines
BEFORE:
grep ... -B {num} ...
grep ... -B{num} ...
Greping and showing some lines
AFTER:
grep ... -A {num} ...
grep ... -A{num} ...
Greping and showing some lines both
BEFORE and
AFTER:
grep ... -C {num} ...
grep ... -C{num} ...
Source:
StackOverflow