Regular Expressions 101

Non-Capturing Group(?:.*\r?\n){2}

{2}repeats the group contents below exactly 2 times:

.*any Unicode character (except for line terminators), repeated any number of times

\r?optionally matches a carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

.*any Unicode character (except for line terminators), repeated any number of times

random datathe literal text random data (case sensitive)

.*any Unicode character (except for line terminators), repeated any number of times

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?:.*\r?\n){2}.*random data.*

New

Line 1
Line 2
Line 1 with random data.
Line 4
Line 5
Line 2 with random data.
Line 7
Line 8
Line 9
Line 10
Line with random data.Line with random data.