Can you explain the regex more?

Certainly! Let's break down the regex pattern used in your grep command:

portid="[0-9]*".*state="[^"]*"

Components:

1. portid=":

   • Matches the literal string portid=".

2. [0-9]*:

   • Matches zero or more digits (0-9).
   • The * quantifier means that it can match any number of digits, including none.

3. ".*:

   • Matches a double quote " followed by any characters (zero or more) until the next part of the pattern.
   • The .* means "match any character (.) zero or more times (*)".

4. state=":

   • Matches the literal string state=".

5. [^"]*:

   • Matches zero or more characters that are not a double quote.
   • The [^"] is a character class that negates the double quote, meaning it will match any character except ".

6. ":

   • Matches the closing double quote.

Summary:

The regex captures the portid attribute with its numeric value and the state attribute with its value, ensuring that the values are correctly formatted within quotes. If you have more questions or need further details, let me know!