Regular Expressions 101

clientthe literal text client (case sensitive)

\sany whitespace character

Non-Capturing Group(?:@\w+\s)?

?repeats the group contents below at most once:

@the literal @ (64₁₀ / 100₈ / 40₁₆)

\w+any word character, repeated at least once

\sany whitespace character

Group client(?P<client>\d+\.\d+\.\d+\.\d+)

\d+a digit, repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Global pattern flags

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

client\s(?:@\w+\s)?(?P<client>\d+\.\d+\.\d+\.\d+)

New

2020-01-30T12:50:39-05:00 173.12.5.49 named[15584]: client @0x7f74cc307f80 173.27.28.143#50046 (www.google.ru): query: www.google.ru IN A + (173.20.3.47)

2020-01-30T12:50:21-05:00 173.19.9.46named[15584]: 30-Jan-2020 12:50:21.069 client 173.24.28.149#50769: UDP: query: sync3.adsniper.ru IN A response: SERVFAIL +

Regular Expression

Substitution