How to select a regular substring from a file?

Question

linux

Prompt
There is a file, it has a lot of lines
. You need to select all the matches that fall under the regex.
That is, 1 line at the output - 1 match . The
line is not needed, but only where it matched
. If on 1 line in the input. file more than 1 match, should return each as a new line..

Is there such a solution?

Answer 1

grep -o