Regular Expressions 101

Group before(?P<before>/(home|Users)/)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 2(home|Users)

1st Alternativehome

homethe literal text home (case sensitive)

2nd AlternativeUsers

Usersthe literal text Users (case sensitive)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group user_name(?P<user_name>([a-z0-9_-]|{{\s*.*?\s*}})[a-z0-9_-]{,255})

Group 4([a-z0-9_-]|{{\s*.*?\s*}})

1st Alternative[a-z0-9_-]

Character Class[a-z0-9_-]

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

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

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

2nd Alternative{{\s*.*?\s*}}

{{the literal text {{

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

.*?any Unicode character (except for line terminators), repeated any number of times

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

}}the literal text }}

Character Class[a-z0-9_-]{,255}

{,255}matches between 0 and 255 characters from the set below:

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

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

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

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

(?P<before>/(home|Users)/)(?P<user_name>([a-z0-9_-]|{{\s*.*?\s*}})[a-z0-9_-]{,255})

New

path: /home/{{ admin_user | default('azureuser') }}/.ssh/authorized_keys