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  1. #!/bin/bash
  2. s='567
  3. com.ab
  4. com.ab
  5. 123
  6. com.ac
  7. com.ad
  8. com.ab
  9. com.ac
  10. com.ad
  11. abc'
  12. awk 'index($0, "com.a") && !seen[$0]++' <<< "$s"
Success #stdin #stdout 0.01s 5504KB
comments (?)
stdin 
Standard input is empty
stdout 
com.ab
com.ac
com.ad
https://ideone.com/b6L54F
language:
Bash (bash 5.0.3)
created:
4 years ago
visibility:
secret

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