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  1. #!/bin/sh
  2.  
  3. STRING=$(cat<<EOF
  4. blah blah blah
  5. hello world
  6. hello people
  7. something
  8. EOF
  9. )
  10.  
  11. echo "$STRING" | grep -P '^(?!.*hello).*$'
Success #stdin #stdout 0.02s 5312KB
comments (?)
stdin
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Standard input is empty
stdout
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blah blah blah
something
https://ideone.com/sTRTHD
language:
Bash (bash 5.0.3)
created:
10 years ago
visibility:
secret

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