Regular Expressions 101

^start of string

FIXTEST_the literal text FIXTEST_ (case sensitive)

Group 1([A-Za-z0-9]+)

Character Class[A-Za-z0-9]+

+matches at least one character from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\s+any whitespace character, repeated at least once

Group 2([0-9]+)

Character Class[0-9]+

+matches at least one character from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

tcpthe literal text tcp (case sensitive)

\s+any whitespace character, repeated at least once

#the literal # (35₁₀ / 43₈ / 23₁₆)

\s*any whitespace character, repeated any number of times

Group 3([A-Za-z0-9.]+)

Character Class[A-Za-z0-9.]+

+matches at least one character from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Group 4([0-9]+)

Character Class[0-9]+

+matches at least one character from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\s*any whitespace character, repeated any number of times

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^FIXTEST_([A-Za-z0-9]+)\s+([0-9]+)\/tcp\s+#\s*([A-Za-z0-9.]+):([0-9]+)\s*

New

FIXTEST_XYZ             23040/tcp       # 127.0.0.1:23040