Regular Expressions 101

\s+a Unicode whitespace character, repeated at least once

Non-Capturing Group(?:-|\d+)

1st Alternative-

-the literal - (45₁₀ / 55₈ / 2D₁₆)

2nd Alternative\d+

\d+a Unicode decimal digit, repeated at least once

\s+a Unicode whitespace character, repeated at least once

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

\s+(?:-|\d+)\s+

New

Internet  10.241.130.14         159   f0d5.bf04.e3b8  ARPA   GigabitEthernet0/0.20
        Internet  10.241.130.17           1   ecf4.bb6b.918a  ARPA   GigabitEthernet0/0.20
        Internet  10.241.130.19          47   f01f.af10.7a45  ARPA   GigabitEthernet0/0.20
        Internet  10.241.130.20           0   5475.d0ab.a86c  ARPA   GigabitEthernet0/0.20
        Internet  159.142.132.97          -   6073.5cc5.6598  ARPA   GigabitEthernet0/0.20

Regular Expression

Substitution