Grep characters before and after match?

Question

Using this:

grep -A1 -B1 \"test_pattern\" file

will produce one line before and after the matched pattern in the file. Is there a way to di

Answer 1

You could use

awk '/test_pattern/ {
    match($0, /test_pattern/); print substr($0, RSTART - 10, RLENGTH + 20);
}' file