(?sm)
match the remainder of the pattern with the following effective flags: gmss modifier: single line. Dot matches newline characters
m modifier: multi line. Causes ^ and $ to match the begin/end of each line (not only begin/end of string)
interface matches the characters interface literally (case sensitive)
1st Capturing Group (\S*)
\S*
matches any non-whitespace character (equal to [^\r\n\t\f\v ])* Quantifier — Matches between zero and unlimited times, as many times as possible, giving back as needed (greedy)
Non-capturing group (?:(?!^!$).)*
* Quantifier — Matches between zero and unlimited times, as many times as possible, giving back as needed (greedy)
Negative Lookahead (?!^!$)
Assert that the Regex below does not match
^ asserts position at start of a lineLines are delimited by \n
! matches the character ! literally (case sensitive)
$ asserts position at the end of a lineLines are delimited by \n
. matches any character
port-security matches the characters port-security literally (case sensitive)
.*?
matches any character *? Quantifier — Matches between zero and unlimited times, as few times as possible, expanding as needed (lazy)
! matches the character ! literally (case sensitive)
$ asserts position at the end of a lineLines are delimited by \n
g modifier: global. All matches (don't return after first match)
m modifier: multi line. Causes ^ and $ to match the begin/end of each line (not only begin/end of string)