^start of line
ip dhcpthe literal text ip dhcp (case sensitive) .*any Unicode character (except for line terminators), repeated any number of times
Non-Capturing Group(?:\n(?!!).*)* *repeats the group contents below any number of times:
\na line-feed (newline) character (ASCII 10)
!the literal ! (3310 / 418 / 2116)
.*any Unicode character (except for line terminators), repeated any number of times
\na line-feed (newline) character (ASCII 10)
.*any Unicode character (except for line terminators), repeated any number of times
overridethe literal text override (case sensitive) g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string