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  1. #!/bin/bash
  2. s="!
  3. interface GigabitEthernet0/0
  4.  shutdown
  5. !
  6. interface GigabitEthernet0/1
  7. !
  8. interface GigabitEthernet0/2
  9.  shutdown
  10. !
  11. interface GigabitEthernet0/3 
  12. !"
  13. grep -Poz '(?m)^!\R\Kinterface.*\R(?=!$)' <<< "$s"
Success #stdin #stdout 0s 4280KB
comments (?)
stdin 
Standard input is empty
stdout 
interface GigabitEthernet0/1
interface GigabitEthernet0/3
https://ideone.com/e7GIIh
language:
Bash (bash 5.0.3)
created:
5 years ago
visibility:
secret

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