Regular Expressions 101

Pro

^start of line

Non-Capturing Group(?:[\w\W]*\s)?

?repeats the group contents below at most once:

Character Class[\w\W]*

*matches any number of characters from the set below:

\wany word character

\Wany non-word character

\sany whitespace character

Group 1(\d{5})

\d{5}a digit, repeated exactly 5 times

Non-Capturing Group(?:\s[\w\W]*)?

?repeats the group contents below at most once:

\sany whitespace character

Character Class[\w\W]*

*matches any number of characters from the set below:

\wany word character

\Wany non-word character

$end of line

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.

25 tokens

Regular Expression

^(?:[\w\W]*\s)?(\d{5})(?:\s[\w\W]*)?$

New

CRITICAL - 192.111.6.4: rta nan, lost 100%
Created Time    Tue, 5 Jul 8:45
Integration Name    CheckMK Integration
Node    192.111.6.4
Metric Name POS1
Metric Value    DOWN
Resource    54871
Alert Tags  54871, POS1

Extraction

CRITICAL - 192.111.6.4: rta nan, lost 100%
Created Time    Tue, 5 Jul 8:45
Integration Name    CheckMK Integration
Node    192.111.6.4
Metric Name POS1
Metric Value    DOWN
Resource    54871
Alert Tags  54871, POS1